Improved device of power supply for electrolysis

The main structure of the improved power supply unit includes an electrolytic power supply formed by series capacitor banks. The series capacitor banks, commutator and contact head are connected by a conducting wire in a certain mode to implement the application of said electrolytic power supply. Each series capacitor bank is composed of charging plate, induction plate and dielectric plate. One conductor is led out from each charging plate, two conductors are led out from each induction plate, those conductors are connected with the contact head in a certain mode, and the commutator is rotated at a certain speed so as to make the contact parts of the commutator and contact head connect or break.