Outer shell sheet metal part connection structure

The utility model relates to a connection structure of a machine body shell, in particular to an outer shell sheet metal part connection structure. The connection structure comprises a sheet metal part and an edge framework, the edge of the sheet metal part is provided with a flange, the flange is provided with a through hole, the edge framework is provided with an installation hole matched with the through hole, a spring plug-pin assembly is arranged between the installation hole and the through hole in a penetrating mode, the spring plug-pin assembly comprises a plug-pin base, a plug-pin handle, a push rod and a compressed spring, the plug-pin base is fixed on the sheet metal part and located under the through hole, the plug-pin base is provided with a guide hole coaxial with the through hole, one end of the push rod is connected with the plug-pin handle, the other end of the push rod is an insertion end, the insertion end sequentially penetrates through the guide hole in the plug-pin base, the compressed s