The invention discloses an automatic welding system for a coil conductive assembly of a circuit breaker. The automatic welding system comprises a turntable assembly arranged on a horizontal table facet. The turntable assembly comprises an inner turntable and an outer turntable. A synchronous high-speed grabbing mechanism is arranged on the inner turntable. An indexing mechanism is arranged under the outer turntable. Twelve stations are arranged uniformly along the external circumference of the outer turntable. A set of station fixture is mounted on each station. A first pushing air cylinder and a second pushing air cylinder are arranged on the inner turntable. An oil cup feeding mechanism, a lower gasket feeding mechanism, a coil feeding mechanism, an upper gasket feeding mechanism, a magnetic yoke feeding mechanism, a soldering mechanism and a discharging mechanism are arranged on the outer side of the circumference of the outer turntable. Three-axis manipulators of the synchronous high-speed grabbing mechanism are arranged on the upper portions of the oil cup feeding mechanism, the lower gasket feeding mechanism, the coil feeding mechanism, the upper gasket feeding mechanism, the magnetic yoke feeding mechanism and the discharging mechanism correspondingly. The device is compact in structure, assembly in-place is achieved, and the welding quality is stable and reliable.