The utility model discloses a block terminal mounting structure belongs to machinery, including block terminal body and block terminal connecting piece, the face is at least connected including the first face of connecting that is used for installing at the block terminal body back with the second that is used for installing on the wall body to the block terminal connecting piece, first connectionface with it is parallel nevertheless on the coplanar that the face is connected to the second. The beneficial effects of the utility model are that: connecting piece through to between block terminal body and the wall body is optimized, design first connection face and second connection face on the connecting piece parallel nevertheless on the coplanar become, make the certain clearance of outflow between block terminal and the wall body, avoid in the same direction as the wall infiltration down to flow in that the block terminal is inside to be caused the inside components and parts short circuit of block terminal and arouse the incident, the efficiency of the block terminal installation is improved, the specially adapted subway, utility tunnel, the block terminal installation of underground works projects such as urban underground space development.