Provided is a ground protection explosion-proof plug, comprising a through housing assembly. A base assembly is provided in the housing assembly, and several pressing assemblies are provided in the base assembly. The base assembly further comprises a mounting base embedded in the housing assembly, the several pressing assemblies are fixed on the mounting base in a penetrating manner, each pressing assembly comprises several butt-joint pins (1) and a ground pin assembly (2), and the ground pin assembly (2) comprises a ground pin (201) and a ground reed (202) provided on the ground pin (201). The ground reed (202) is in contact with and abuts against the housing assembly, thereby expanding the ground protection form of a connector, and solving the technical problems in the prior art that it is not easy to implement grounding and the grounding is not stable due to the small space of an electrical connector assembly.