Abstract: In response to the problem of significant settlement errors in the engineering dewatering costs of power transmission and transformation projects, a engineering dewatering detection and analysis system for power transmission and transformation projects based on Bashal trough is proposed. The system enables to detect the drainage and drainage time of water pumps, analyze the detection data with a statistics of total drainage, exactly calculate the dewatering shifts per water pump, reasonably control the cost of dewatering, and is available for a variety of projects.