Clamping device of stamping die

The utility model discloses a stamping die clamping device which comprises a fixed base, the outer surface of the upper end of the fixed base is fixedly connected with a first limiting column, a second limiting column and the outer surface of the lower end of an elastic piece. According to the stamping die, the distance between the two sets of clamping assemblies can be adjusted according to the size of a material needing to be stamped through the connecting block, the mounting plate, the fixing column, threads, a rotary disc, a connecting rod, a clamping plate, a rubber clamping plate, a first threaded groove and a second threaded groove, the stamping stability of the material needing to be stamped is further improved, and therefore the stamping precision is further improved; compared with the prior art, the assembling and disassembling process when the clamping plate needs to be replaced is further simplified, the stability between the fixing column and the clamping plate is further guaranteed, the stabilit