The invention provides an automatic positioning stud nailing system. The automatic positioning stud nailing system comprises a conveying unit, a hole positioning unit, a transfer platform, a stud nailing machine and a control unit. The conveying unit, the hole positioning unit, the transfer platform and the stud nailing machine are electrically connected with the control unit; the conveying unit comprises a conveyor for conveying plates, a first blocking part for preventing the plates from moving forwards, a second blocking part for preventing the plates from moving forwards and a lateral abutting device; the first blocking part is arranged at the tail end of the operation surface of the conveyor and is vertical to the forward direction of the plates, the second blocking part is arranged at one side of the operation surface of the conveyor and is parallel to the forward direction of the plates, and the lateral abutting device is arranged at the edge of the other side of the operation surface of the conveyor and can push the plates to horizontally move towards the second blocking part; the stud nailing machine is located at the tail end of the transfer platform, the hole positioningunit is arranged above the operation surface of the conveyor, and the transfer platform is arranged at the outer side of the operation surface of the conveyor; after the hole positioning unit completes positioning, the transfer platform transfers the positioned plates to the operation station of the stud nailing machine. According to the automatic positioning stud nailing system, manual positioning and stud nailing are replaced by automation equipment, automation production is achieved, the labor is saved, the precision is improved, product standardization is achieved, and the production efficiency of the system incomparable relative to manual production.