The utility model discloses an under assembly platform that goes between, including operation platform, wire support, insulator support group, cylinder and control switch, operation platform establishes on upper portion wire support and insulator support group, wire support includes wire support main part, calliper position, the calliper position includes T type groove, and the pincers body is gone up to the arm of force keeps silent on, and the pincers body is kept silent down, and the stopper goes between down, T type groove is established to wire support main part one side outer wall, and the arm of force that links to each other with the cylinder is established to inside, is connected with the pincers body on the arm of force, keeps silent on going up that pincers body bottom establishes that the arc caves in, the lower pincers body that suits with the last pincers body is established to the below in T type groove, down pincers body top establish the arc sunken and with on keep silent suit lower and keep silent, the lead wire stopper is set to one side of the pincers body down, the cylinder provides power for the arm of force, through the motion of the control switch control arm of force. Insulator support group includes two insulator support frames, is equipped with the insulator on the insulator support frame and supports the mouth.