Power distribution equipment (111, 112; 121, 122), comprising a power distribution device and a power distribution box, wherein a) the power distribution device is capable of being inserted into and removed from the power distribution box; b) a connection port is disposed at a first end of the power distribution device, wherein the connection port is used to connect a power cable or a user load line; c) a power connection terminal is disposed at a second end of the power distribution device, wherein the power connection terminal is used to plug into a busbar inside the power distribution box; d) the connection port and the power connection terminal are connected inside the power distribution device; e) wherein the power distribution device is a circuit breaker; f1) wherein a latch is disposed on one side of the power distribution device, and f2) a square hole corresponding to the latch is disposed in a top cover of the power distribution box; and g1) wherein the power distribution device further comprises a pull handle, wherein g2) the pull handle is disposed at a front end of the power distribution device; and g3) an internal mechanism of the pull handle is connected to the circuit breaker, and when the pull handle is pulled out, the connection port is disconnected from the power connection terminal, or when the pull handle is pushed in, the connection port is connected to the power connection terminal; and h1) in actual application, before contacts inside the power distribution device are disconnected, the latch fits in the square hole and cannot be compressed by the top cover to prevent the power distribution device from being pulled out while the power distribution device is in operation; and h2) the latch can be compressed downward to be detached from the square hole only when the pull handle of the power distribution device is pulled with an external force and the contacts inside the power distribution device are disconnected to allow the power distribution device to be pulled put entirely from the power distribution box. a) the power distribution device is capable of being inserted into and removed from the power distribution box; b) a connection port is disposed at a first end of the power distribution device, wherein the connection port is used to connect a power cable or a user load line; c) a power connection terminal is disposed at a second end of the power distribution device, wherein the power connection terminal is used to plug into a busbar inside the power distribution box; d) the connection port and the power connection terminal are connected inside the power distribution device; e) wherein the power distribution device is a circuit breaker; f1) wherein a latch is disposed on one side of the power distribution device, and f2) a square hole corresponding to the latch is disposed in a top cover of the power distribution box; and g1) wherein the power distribution device further comprises a pull handle, wherein g2) the pull handle is disposed at a front end of the power distribution device; and g3) an internal mechanism of the pull handle is connected to the circuit breaker, and when the pull handle is pulled out, the connection port is disconnected from the power connection terminal, or when the pull handle is pushed in, the connection port is connected to the power connection terminal; and h1) in actual application, before contacts inside the power distribution device are disconnected, the latch fits in the square hole and cannot be compressed by the top cover to prevent the power distribution device from being pulled out while the power distribution device is in operation; and h2) the latch can be compressed downward to be detached from the square hole only when the pull handle of the power distribution device is pulled with an external force and the contacts inside the power distribution device are disconnected to allow the power distribution device to be pulled put entirely from the power distribution box.