It is used to carry out hydrostatic pressure test on welded pipe to check whether the welded pipe has leakage defects under specified pressure, so as to ensure the performance of welded pipe. The maximum allowable working load capacity of the computer-controlled hydraulic testing machine: 3000 tons, and its maximum test capacity: 30Mpa. The pressure value-stabilization time curve can be continuously recorded during the welded pipe hydraulic test process, and the hydraulic test record of each welded pipe can be saved curve.