The invention relates to an electroplating workpiece surface treatment device and belongs to the technical field of workpiece surface treatment. According to the technical scheme of the device, the device comprises an electroplating bath used for containing electroplating liquid, a supporting frame arranged in the electroplating bath and used for supporting a hanging rod, a lifting assembly arranged in the electroplating bath and used for driving the supporting frame to rise and fall so as to enable the hanging rod on the supporting frame to drive a clamp to rise and fall, and a grinding assembly arranged on the electroplating bath and used for grinding the clamp on the hanging rod so as to remove metal powder adhering to the surface of the clamp. When the surface treatment device providedby the invention is used, the copper powder adhering to the surface of the clamp can be quickly removed, the time for removing the copper powder from the clamp is saved, accordingly, the working efficiency can be effectively improved, and harm of harmful gas on surrounding working staff is reduced.