Trapezoidal safe operation support

The utility model discloses a trapezoid safe operation support which comprises a top frame, an inclined supporting rod, a middle transverse pipe and a lower transverse pipe. A hoist hanging rack is clamped at the top of the top frame; lap joint assemblies are fixed to the bottoms of the four corners of the top frame in an inserted mode, the adjacent lap joint assemblies are fixed through connecting rods, the bottoms of the lap joint assemblies are movably connected with the inclined supporting rods, adjustable lower transverse pipes are fixed to the bottoms of the adjacent inclined supporting rods in an inserted mode, and the lower transverse pipes and the inclined supporting rods form four slopes. An adjustable middle transverse pipe is inserted and fixed between the two inclined supporting rods on any three inclined surfaces, and a protective net is fixed between the middle transverse pipe and the lower transverse pipe; when the device is used, a lifting motor can be installed on the hoist hanging frame to