The utility model relates to the technical field of power distribution devices, and discloses a power distribution box convenient for wire arrangement, which comprises a box body, U-shaped wire bunching plates are fixedly connected to the left and right sides of the lower surface of the box body, wire bunching grooves are formed in the outer surfaces of the left and right sides of the U-shaped wire bunching plates, and connecting rods are movably connected to the inner surfaces of the U-shaped wire bunching plates. The lower surface of the connecting rod is fixedly connected with an L-shaped block located on the inner side of the U-shaped wire bunching plate. By arranging the bunching groove, the connecting rod, the L-shaped block, the pulling plate and the spring, firstly, an operator pulls the pulling plate to enable the pulling plate, the connecting rod and the L-shaped block to start to move forwards, and when the L-shaped block does not shield the bunching groove any more, the operator puts a cable into the bunching groove and then loosens the pulling plate, so that the cable is bunched. And at the moment, the whole L-shaped block can automatically recover the shielding of the wire bunching groove under the elastic force action of the spring, so that the wire is limited in the wire bunching groove, and the arrangement of the accessed cable is realized.