The utility model discloses a rotation type electric power instrument, including body, rotor plate, fixed plate, second draw -in groove, connecting block, rotation axis, fixed column, first recess, protective housing and observation window, the below of body is provided with the rotor plate, the inside of rotor plate is provided with the second draw -in groove, and the one end of rotor plate is provided with the connecting block, the bottom of connecting block is connected with the rotation axis, the inside of establishing at the fixed plate is inserted to the one end of rotation axis, the inside of fixed plate is provided with first recess, the inside of first recess is provided with the fixed column, one side of body is provided with the protective housing, the inside of protective housing is provided with the observation window, the utility model discloses a setting up the protective housing that has the observation window in instrument control panel's the outside, being convenientfor in the data of the simultaneous observation electric power instrument of protection electric power instrument, through the rotor plate of placing the angle that sets up accessible rotation regulation electric power instrument, convenient to use person adjusts the angle of electric power instrument, and the better observes.