Fluid differential circuit

The utility model relates to a fluid differential circuit which comprises a cylinder body, a piston and a piston rod which are matched with the cylinder body and relatively move back and forth, as well as a valve connected with the cylinder body, wherein the cylinder body is connected with a fluid inlet and a fluid outlet on the two sides of the piston; the inlet and the outlet are connected withan A valve and a B valve respectively; a C valve is connected between the A and the B valves and a pipeline connected with the cylinder body; the C valve is opened after the A valve is stopped, so that a fluid on one side of the cylinder body flows into the other side of the cylinder body through the C valve; because the C valve is connected to a recirculation system, the fluid on the left side inthe cylinder body flows into the right side in the cylinder body through the C valve directly, namely the fluid does not need to flow through paths such as a reversing valve A, a reversing valve B, an oil pump and the like. T