The invention discloses a PCB two-sided copper deposition system. The PCB two-sided copper deposition system comprises a hollow shell with an opening in one end, a plurality of partition plates are arranged in the shell and divide the shell into a plurality of sealed cavities, all the cavities are communicated with the opening end of the shell, a hollow reaction cylinder with an opening in one end is formed in each cavity, each reaction cylinder is connected with the wall face of the adjacent shell or the wall face of the adjacent partition plate, the opening end of each reaction cylinder is arranged above the opening end of the shell, a motor is arranged at the bottom of the shell, and the motor is connected with the bottom of the shell. The equipment used in the copper deposition system is simple in structure, surface treatment and copper deposition treatment can be performed on the same equipment, so the interval time of the surface treatment and copper deposition treatment is shortened, the problems related to treatment aging are avoided, and the quality of copper deposition can be guaranteed.