The invention discloses a three-phase moving contact alignment device. The alignment device comprises a positioning mechanism, a supporting mechanism and a guiding mechanism, wherein the supporting mechanism is installed on the positioning mechanism, and the guiding mechanism is installed on the supporting mechanism. The positioning mechanism can be firmly connected with disc insulators of three-phase moving contacts in a sleeved mode, the distance between three guiding holes in a front angle positioning plate and a rear angle positioning plate on the guiding mechanism is consistent with that between conducting rod holes in three-phase moving contact conductors, the three-phase moving contacts are assembled, operated and adjusted on the same alignment device, the distance between three conducting rods inserted in the three-phase moving contact conductors can be adjusted conveniently and accurately, the requirements for assembly size accuracy and position accuracy can be ensured better, the alignment accuracy and assembly speed are high, and labor production efficiency is substantially improved.