Testing system for positive and negative rotation performance of closed type hydraulic pump

The invention discloses a testing system for the positive and negative rotation performance of a closed type hydraulic pump. The testing system comprises a main oil tank, a first testing oil path, a second testing oil path, a bridge type loop, a leakage oil path, a control oil path and a pressure oil supply path; the bridge type loop is of a closed type loop structure formed by connecting a first one-way valve, a second one-way valve, a third one-way valve and a fourth one-way valve in sequence; a first joint, a second joint, a third joint and a fourth joint are sequentially formed between the adjacent one-way valves. The testing system can test the flow, pressure and temperature when the closed type hydraulic product pump runs, can also carry out impact and positive and negative rotation tests on the hydraulic product pump, and has the advantages of being wide in testing purpose, convenient to operate and the like.