In this paper, the problems with the protection and control of underground mining power distribution devices, which exist in the same source of power supply and power supply system were analyzed, a method of independent power supply for mining were proposed, the power supply mode for protection and control of mine power distribution device, mine lithium-ion battery power supply,mine PT protection box and its power switching device were researched and designed, the independent power supply of protection and control power supply, one for use and one for standby were realized, the safe operation of the power supply system were ensured.