The invention discloses a blanking and discharging mechanism based on automobile die machining. The mechanism comprises a material supporting mechanism and supporting and adjusting frames which are symmetrically arranged at the two ends of the bottom of the material supporting mechanism; and the material supporting mechanism comprises two buffer fixing frames which are symmetrically distributed left and right, roller line groups are uniformly distributed between the two buffer fixing frames in the front and back direction, and material distributing mechanisms are arranged in the middle of theroller line groups. According to the blanking and discharging mechanism based on the automobile die machining, buffering and supporting protection can be carried out on blanking of the automobile diemachining through the material supporting mechanism and the supporting and adjusting frames which are symmetrically installed at the two ends of the bottom of the material supporting mechanism, so that abrasion of a workpiece is avoided, and unnecessary waste is reduced; and further the size can be adjusted according to the actual size of the workpiece, meanwhile, inclination angle adjustment canbe carried out in the blanking process, so that good utilization and popularization values are achieved.