The invention discloses a bridge facility which includes an electrical connecting base and an electrical connecting head connected with electrical maintenance equipment. An inserting shaft symmetric in the front-back direction is fixedly installed on the left end face of the electrical connecting head. The left end of the inserting shaft extends out of the electrical connecting head, and an external thread is arranged on the left end of the inserting shaft. Fixed blocks are fixedly arranged on the right sides of the upper and lower end faces of the electrical connecting base. A screw hole is arranged in each fixed block. An inserting cavity with a rightward opening is arranged in the electrical connecting base in a front-back symmetry manner. A transfer slot communicated with the inserting cavity is arranged at the left end of the inserting cavity. A cavity body communicated with the transfer slot is arranged at the left end of the transfer slot. An arc slot is arranged in the transfer slot. An installation connection slot communicated with the arc slot is arranged at the upper end of the arc slot. A transfer frame is operatively mounted in the transfer slot. A middle slot communicated with the left and right is arranged in the middle of the transfer frame. An internal thread matching the external thread is arranged on the inner wall of the middle slot.