Manual clamping device

The utility model discloses a manual clamping device, relates to the technical field of part processing, and solves the problems that in the prior art, a pipe is generally held by one hand and is cut by the other hand, so that fixation is very unstable during cutting, the cutting quality cannot be effectively controlled, and the cutting efficiency is high. And the rejection rate of the pipes is easily increased. Comprising a supporting plate, a fixing box is fixedly installed on one side of the top end of the supporting plate, a rotating assembly is arranged in the fixing box and comprises a rotating rod, a rotating disc, an arc-shaped plate and a swing rod, the rotating rod is rotationally connected to the left side in the fixing box, and the rotating disc is fixedly installed on the surface of the rotating rod; the pipe cutting device has the advantages that a pipe can be manually clamped and fixed, the fixing is more stable, the cutting quality of the pipe is improved, the rejection rate of the pipe is gre