The invention discloses a waste collection device of a stamping die for special steel casting. The waste collection device comprises a supporting base, a sliding groove, a first rotating shaft and a locking groove, wherein a connection sleeve fixedly adheres to the upper end of the supporting base, a damping spring is installed inside the connection sleeve, a connection rod is arranged at the upper end of the connection sleeve, second rotating shafts are installed on the two sides of the top end of a workbench, a fourth rotating shaft is installed on the surface of the outer wall of a second supporting plate, waste scrap collection grooves are evenly formed in the surface of the top end of the workbench, and a waste scrap collection tank is arranged between the supporting base and the workbench. In the waste collection device of the stamping die for special steel casting, a stable supporting function is achieved for the weight of the upper end of the connection rod through arrangementof the connection rod and the sleeve, the damping spring has an elastic damping effect to a certain extent so that the workbench can maintain the overall stable performance during operation conveniently, and as limiting rods are arranged in a crossed manner, a dual supporting effect is achieved for the workbench.