【正文】 stage, rationally define and control the direction of the project cost of accurate positioning and building Optimization guiding role. In the decisionmaking phase of the most important is to do a good job feasibility study, the work is done well, returns on investment and can form a good proportion. Otherwise, invest more, less effective, resulting in loss of control and waste of investment. At present, some of the projects planned the owners of departure from the subjective desires of a feasibility study on the lack of scientific proof. Feasibility Study untrue, false or engineering functions obtaining the approval of their superiors, actually put into the feasibility study will be awarded in the study for the project after the smooth functioning buried a lot of hidden problems, lead to insufficient followup funds for the project and had to extend the time limit so that the project could not have planned the use of costeffective, even bee hopeless pletion of the beard works. Therefore, in order to phase in the investment decisionmaking effectively control construction costs, we must do the following aspects: ⅰ Implementation of the construction project and corporate accountability, Construction of the project from planning to implementation of the entire process and the use of the funds to repay responsibilities to the people. in addition to establishing a legal system and the project supervision matching mechanism by the departments in charge of the industry and supervision departments for setting up a monitoring group to oversee the use of funds. ⅱ A realistic approach to market analysis, to avoid the blindness of the project decisionmaking, reduces and reduces investment risk. Fully consider building projects in the future market petitiveness, design task more scientific and reliability. ⅲ Capital financing must have a formal mitment document, the parties must do investment funds in place, and funds must have documents to ensure that the project can be approved after the scheduled implementation. To the various loan conditions should be carefully analyzed to minimize the burden of interest and repayment pressure. ⅳ To strengthen the engineering geology, hydrology, geology and land, water, electricity, transport, environmental projects such as external conditions for the work of depth to make the investment estimate there are sufficient grounds. Taking extensive investigation and research, parison of similar projects, seriously functional analysis, multiprogram parison and choice. After full technical appraisal and economic evaluation, and the final technologically advanced, functional and reliable. Reasonable economic projects, thus calculate a more accurate and realistic estimation of the amount of investment, so that the project cost from the start positioning in a more reasonable level. The design phase of the project cost control for a long time, China39。 Calculation of the target group of technical and economic indicators。 the 。 from parison choose the best design. Construction phase of the project implementation unit construction cost management to control the cost of the project is reasonable in the project to meet quality standards premise, in the investment decisionmaking stage, the design phase and construction phase of the project put the project approval occurred in the control limits, strive in various construction projects rational use of human, material and financial resources to achieve good investment returns and social benefits. The project cost control and management is a dynamic process. The dynamic market economy, to make the investment in the identification and control bee more plex, this will require the construction units to the management of project cost to the project runs through the entire process, it is necessary to have a prehensive focus. The implementation phase of the projects. The implementation phase of the project cost management is the implementation of the entire process of project management. Project implementation phase of the project cost management can be divided into three parts: the tender management, construction management and settlement management. Bidding for the construction phase of the construction units Bidding system control engineering cost effective means, bid anization can improve the costeffectiveness of construction projects and ensure the quality of construction projects, shortening the construction cycle return on the investment, construction units can take full advantage of bidding for the effective means of cost control. Construction No. 10 on the 7th ministerial decree issued a contract with the Construction Contract Pricing Management. clearly pointed out in bidding for projects using inventories. This requires the building of units conducting the tender exercise, in the tender document to include not only the usual content, like tender notes before schedule, tender notes, the conditions of the contract, the contract terms of the agreement, contract format, technical specifications, drawings, tender documents and other reference format, it is also necessary to provide the engineering inventory, Bidding as a reference document of the important ponents. Construction units in the tender document for the project inventory, in accordance with state or local rules promulgated by the calculation that the reunification of the divided projects, unified measurement units and the reunification of the engineering calculation rules, according to design drawings to be calculated and statistical arranged, obtain the list. Quantities to be followed in the preparation of an objective, impartial, scientific, and rational principle. Compilers must have strong manly budget, and should have certain knowledge of the engineering design and construction experience,