Test clamp

A test clamp involving test comprises a base plate. The test clamp is characterized in that: the base plate is provided with an active plate, and the space between the active plate and the base plate is adjustable, and the active plate is opened with work piece groove which comprises a square groove and s nearby rectangle groove, and the latter pulls through the active plate in the whole length and the front middle of the active plate is opened with arc notches; the middle of rectangle groove is opened with horizontal groove. The active plate and the base plate are connected with each other through bolt sleeve mechanism including sleeve and bolt, of which are connected through screws. The bottom of sleeve is connected with base plate, and the upper of bolt is fastened with active plate. Spring is set between active plate and sleeve. The base plate is also set with another base plate between the base plate and active plate; the base plate is surrounded by two side plates, a front plate, and a back plate. The utility model has advantages of high precision, strong operability, and strong practice.