The invention discloses a distribution box convenient to adjust the mounting height of internal electric appliances, and the distribution box includes a box body, a support block, a lead screw, a screw sleeve, a mounting block, a sliding block and a sliding groove, the lower end of the box body is mounted on the support plate, the lower end of the support plate is fixedly connected with a fixed screw sleeve and an L-shaped fixed block, the fixed screw sleeve is screwed with a roller assembly, the roller assembly is provided with a lifting screw, an L-shaped fixed block is provided with a mounting hole and a threaded hole, and a distribution box lifting bolt assembly is mounted in the threaded hole. As the screw rod rotates, the screw sleeve can be driven to move, the threaded sleeve can move up and down along the sliding groove through the sliding block, then the screw sleeve drives the mounting plate to realize the height adjustment inside the box body through the mounting block, thereby changing the height of the electric equipment on the mounting plate, facilitating the mounting and wire arrangement, solving the trouble of the wire arrangement and the mounting, making movement of the distribution box easy, saving manpower and material resources, making operation convenient and quick, and greatly improving the work efficiency.