Turnover workbench of horizontal machining center

The invention discloses a turnover workbench of a horizontal machining center, which comprises a workpiece cleaning assembly, supporting legs, a mounting bottom plate and an adjusting cavity, whereinthe adjusting cavity is formed in the surface of the top end of the mounting bottom plate; the supporting legs are evenly arranged on one side of the adjusting cavity at intervals; the workpiece cleaning assembly is arranged on one sides of the supporting legs; a fixing clamp is arranged at the top end of the workpiece cleaning assembly; a turnover shaft is connected to one side of the fixing clamp; a conveying belt is arranged on one side of the turnover shaft; and a stock bin fixing assembly is arranged at the top end of the conveying belt. As the stock bin fixing assembly is arranged, the stability of material adding is guaranteed, the equipment damage probability is reduced, and the service life of the equipment is prolonged; and as the workpiece cleaning assembly is arranged, dust isprevented from influencing