DC power supply and power supply device

The utility model relates to a direct-current power supply and a power supply device. The direct current power supply comprises a main power supply circuit used for providing direct current; and a plurality of output branches. The multiple output branches are independently arranged at the output end of the main power supply circuit in parallel; each output branch is also used for being connected with at least one piece of power receiving equipment; a low-frequency filter circuit and a high-frequency filter circuit are connected in series in each output branch; and the parameters of the low-frequency filter circuit and the high-frequency filter circuit in each output branch are adjustable. Each output branch of the DC power supply is provided with a low-frequency filter circuit and a high-frequency filter circuit. And the parameters in the low-frequency filter circuit and the high-frequency filter circuit are adjustable, so that the respective parameters can be adjusted according to requirements, the clean dir