Reciprocating test device for oil cylinder

The utility model discloses an oil cylinder reciprocating test device, which comprises a large cylinder barrel and a small cylinder barrel which are respectively provided with a rodless cavity oil port and a rod cavity oil port, a large piston is arranged in the large cylinder barrel, a cylinder bottom and a sealing seat are respectively and fixedly arranged at two ends of the large cylinder barrel, and a piston rod, a piston and a guide sleeve are arranged in the small cylinder barrel; the front end of the small cylinder barrel is fixedly connected with a connecting seat which is fixedly arranged in a sealing seat, and the front end of a piston rod penetrates through the connecting seat to be fixedly connected with a large piston. A rodless cavity oil port and a rod cavity oil port of the large cylinder barrel are connected with respective reversing valves; an oil inlet pipe is communicated with a rodless cavity of the large cylinder barrel, an oil return pipe is communicated with a rod cavity of the large c