The invention relates to a destacking device, in particular to a skid destacking truss device. The skid destacking truss device comprises a frame, an X-direction moving mechanism, a Z-direction lifting mechanism, a layering mechanism and a single body clamping mechanism, the X-direction moving mechanism is arranged on the frame, the Z-direction lifting mechanism is arranged on the X-direction moving mechanism and driven by the X-direction moving mechanism to move, the layering mechanism and the single body clamping mechanism are correspondingly arranged on the Z-direction lifting mechanism anddriven by the Z-direction lifting mechanism to rise and fall, the layering mechanism is provided with a clamp finger seat plate moving in the Y direction, a plurality of clamp fingers are arranged onthe clamp finger seat plate, when a skid layer is transferred, the end part of a single skid arranged in the Y direction in the skid layer is clamped by the corresponding clamp finger, the single body clamping mechanism is provided with a clamp claw moving in the Y direction, the clamp claw is located below the clamp finger seat plate, and when the skid layer is disassembled, the single skid is clamped by the clamp claw. According to the skid destacking truss device, an entire skid stack with different overall dimensions can be automatically split into single stacks, the destacking efficiencyis greatly improved, and the labor cost is effectively lowered.