The invention discloses a power supply distribution tapping device, and relates to the technical field of power supply tapping. The power supply distribution tapping device enables a power supply to be connected to each power utilization unit through through a relatively closed track acting as a power supply system and a plurality of sockets capable of being inserted at any positions of the track so as to realize safe and flexible power supply and distribution. The power supply distribution tapping device comprises a distribution slot and a plurality of distribution sockets, wherein the distribution slot comprises an upper fixed wall and a lower fixed wall, the upper fixed wall and the lower fixed wall are mutually parallel, and both the upper fixed wall and the lower fixed wall are perpendicular to a side wall. The power supply distribution tapping device is simple in structure and convenient to use, the distribution sockets are inserted into the distribution slot through inserting ports of the distribution slot, and the distribution sockets can slide along the length direction of the distribution slot, thereby realizing functions of multi-point power taking and power-taking position adjustment, being not easy to loose and improving the safety.