| Owing to the merit of rapid construction, shorter working-day, lower cost and high quality, dam construction technique of roller compacted concrete(RCC) have been swift and violent develop and extensive use. The different characteristic of material selection and process engineering between RCC from normal concrete has determined the complexity and special on quality control. Once the RCC construction measure unsuitable or control not strict, the mass defect will occur easily. In this paper, performance characteristics and various factors that affect the quality of hydraulic RCC were analysed according to Processes Quality Control theory. By composing with real engineering, points in quality control of main processes and quality control measure of RCC were put forward, and these will provide the managemen train and the scientific basis of dicision to managers and builders of hydroelectric RCC project。In the beginning of this paper, the background of research job were explained, the mission and method of construction quality control were discussed. The contentand step of Processes Quality Control theory were strengthened. Simultaneously, the characteristic of hydraulic RCC and the points in quality control were analysed, quality factor analysis and quality control method research were developed according to the processes of RCC construction Consequently, useful quality control method were observed, and this has been used for the RCC construction quality control of Letan hydropower station and get good engineering quality. Finally, come to a conclusion of that processes quality control which based on a perfect management system would densure RCC construction quality.
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