The invention provides a power box of a rotary socket protection device with contraction protection, and relates to the field of power. The power box structurally comprises a power box body, a handle,a box door, a control panel, an anti-splashing protection device and a wire guide hole, wherein the upper part of the power box body is connected with the lower end of the handle; a socket protectionmechanism is driven to extend outwards through a fixing frame by pulling out a sealing plate; a socket is rotated to drive a rotating shaft to rotate around a fixed guide rod by 180 degrees so as toenable jacks to face downwards; an outer connector of the socket is inserted into the jacks for connection; the sealing plate is pushed to move into the box body, so that a connecting clamping plate can be embedded into a separation groove; the connecting clamping plate can be driven to rotate by 180 degrees by pushing an action turntable so as to be clamped into an empty groove again for fixation, and a wire of the outer connector head can be led out a the wire guide groove, so that the socket is skillfully arranged inside, and the situation that the socket is splashed by rainwater and sludgeto cause short circuit and large-area power failure is prevented.