At present, the fiscal investment of the government in infrastructure generally shows a trend of intensification, and the requirements of the government and society for investment efficiency are increasing day by day. By applying the system concept, the countermeasures for investment control are proposed from multiple dimensions of overall engineering scheme, specialized technical schemes, refined design and construction coordination. Combined with the practice of the A-channel project, the good investment control effects have been achieved, which can serve as a reference for the preliminary research work of similar projects.