The utility model discloses an engineering construction material waterproof detects and uses fixing device, which comprises a housin, the casing is the cavity setting, be equipped with the baffle of horizontal setting in the casing, and the baffle becomes casing internal partitioning the stock solution chamber and detects the chamber, the stock solution chamber is located detects the setting of chamber top, the upside lateral wall of casing is equipped with the water inlet with stock solution chamber intercommunication, the downside lateral wall of baffle still is equipped with the water shower nozzle, and the stock solution chamber with detect the chamber and pass through water shower nozzle intercommunication, the downside inner wall of casing still is equipped with water storage tank, one side lateral wall of casing is equipped with the water delivery device that sets up with the water storage tank cooperation. The utility model is simple in operation, convenient to use, the fixed building material is simple swift, has improved work efficiency, and the centre gripping is firm, has improved the data accuracy of material waterproof inspection, through setting up the locking universal wheel, the mobile device and brakeing the device be convenient for, but the water source reuse of the detection usefulness in the device, the cost is reduced.