Sponge iron hardness testing device

The utility model discloses a sponge iron hardness testing device, and belongs to the technical field of sponge iron hardness testing. Comprising a base, a sliding rail plate is arranged on the upper portion of the base, a sliding rail groove is formed in the sliding rail plate, a sliding block is arranged in an inner cavity of the sliding rail groove, a mounting plate is fixedly arranged at the front end of the sliding block, a hardness tester is fixedly arranged on the bottom face of the mounting plate, and a fixing part is arranged under the mounting plate and comprises a bottom plate, a clamping plate and two supporting plates. The supporting plates are symmetrically arranged on the two sides of the upper portion of the bottom plate, half-thread bolts transversely penetrate through the supporting plates, the heads of the half-thread bolts are fixedly connected with the clamping plate in a threaded mode, the outer walls of the half-thread bolts are sleeved with springs, and baffles are arranged on the side