A power device comprises an electric connection end connected with power consumption equipment through a cable and a power supply seat body in inserted and matched connection with the electric connection end; the left end surface of the power supply seat body is internally provided with an inserting groove; the upper side and the lower side of the inserting groove are symmetrically provided with clamping grooves; an annular rotating groove is arranged in the inner wall body of the power supply seat body at the right side of the clamping groove; a turntable is arranged in the annular rotating groove in a rotating matched mode; the left end surface of the turntable is internally provided with an inlaying groove; the right inner wall of the inlaying groove is internally provided with a through hole in a communicating mode; the inner wall body of the power supply seat body at the right side of the through hole is provided with an upper fan-shaped electric connection groove and a lower fan-shaped electric connection groove in a communicating mode respectively; the lower inner wall of the upper fan-shaped electric connection groove is internally fixedly provided with a first electric connection block; the top wall in the lower fan-shaped electric connection groove is internally fixedly provided with a second electric connection block; the inner wall body of the power supply seat bodyat the right side of the turntable is provided with an accommodating cavity in a communicating mode; and a rotating column is arranged in the accommodating cavity.