DC power supply system convenient for moving

The invention discloses a DC power supply system convenient for moving, which comprises a cabinet body and a guide rail system, wherein the cabinet body is used for accommodating a battery; the cabinet body is internally provided with a hoister; the bottom part of the cabinet body is provided with moving wheels; the guide rail system comprises two parallelly-arranged sliding grooves; the two sliding grooves are connected through a transverse plate; one end of the sliding groove is provided with an upper horizontal track, and the other end is provided with a lower horizontal track; the extending directions of the upper horizontal track and the lower horizontal track are opposite; and the sliding grooves and the moving wheels are matched. Through arranging the moving wheels at the bottom part of the cabinet body, the cabinet body can move flexibly; and besides, through arranging the guide rail system in lap joint with an engineering vehicle and through match between the sliding grooves and the moving wheels, th