The utility model discloses a device of control polycrystal PERC solar cell decay, including the frame support, general supply and decay platform, the decay platform includes plate electrode and lowerelectrode plate, it puts the piece region to go up to be formed with between plate electrode and the lower electrode plate, go up a fixed connection in the frame support among plate electrode and thelower electrode plate, another is connected with drive arrangement, the inside of going up plate electrode and lower electrode plate all is provided with the boosting stick, the general supply is connected to the boosting stick, the outside of frame support still is provided with the constant current source, the general supply is connected to the constant current source, upward plate electrode and lower electrode plate are connected to the constant current source, the one side of keeping away from the plate electrode of keeping away from lower electrode plate's one side and lower electrode plate of going up the plate electrode all is provided with cooling device. The device can realize that the temperature is even and controllable to but obtain good, the accurate reliable result of uniformity within a short period of time, avoid battery electrode oxidizing's problem simultaneously.