the electromechanical actuator assembly, the bidirectional electromagnetic braking assembly, the circumferential rotating housing assembly and the axial spline bearing assembly are sequentially arranged on a same axis, the axial spline bearing assembly is mounted inside the circumferential rotating housing assembly so as to provide a linear reciprocation, and the axial spline bearing assembly is connected to a rotor lead screw of the electromechanical actuator assembly to form a screw transmission pair; the bidirectional electromagnetic braking assembly is actively energized to generate a radial attraction force and an axial attraction force simultaneously, so that the circumferential rotating housing assembly is disconnected with the electromechanical actuator assembly from a fixed connection therebetween and makes a rotary motion, to forcibly deactivate a connection between the axial spline bearing assembly and the electromechanical actuator assembly, and forcibly remove the fuzzy jamming fault or a lag fault between the rotor lead screw in the electromechanical actuator assembly and the transmission mechanism of the axial spline bearing assembly,

wherein the bidirectional electromagnetic braking assembly comprises an axial magnetic rotor, a floating magnetic stator, an electromagnetic coil stator, a spring, a fixing screw and a magnetic steel ball;

the circumferential rotating housing assembly comprises: a circumferential rotating bearing pedestal and an actuator housing;

the axial spline bearing assembly comprises an axial spline nut and an axial spline sleeve;

the electromechanical actuator assembly comprises a lead screw supporting bearing, the rotor lead screw, a front end cover, a front lug, a servo motor and a rear lug;

the electromagnetic coil stator of the bidirectional electromagnetic braking assembly is fixed on the circumferential rotating bearing pedestal, and the axial magnetic rotor is fixed on the rotor lead screw;

when the bidirectional electromagnetic braking assembly is actively energized, the electromagnetic coil stator axially attracts the floating magnetic stator and the axial magnetic rotor, so that the floating magnetic stator, the axial magnetic rotor and the rotor lead screw are fixedly connected to form a whole; the electromagnetic coil stator radially attracts the magnetic steel ball, and the magnetic steel ball compresses the spring into a groove where the circumferential rotating bearing pedestal is located, so that the circumferential rotating bearing pedestal is disconnected with a housing of the servo motor from a circumferential rotating connection therebetween; the fixing screw limits the magnetic steel ball from being moved outward, and thus the spring is kept in a pre-compressed state;

the axial spline nut and the rotor lead screw are mounted on the same axis, the axial spline nut moves linearly through the screw transmission when the rotor lead screw rotates around the fixed axis; the circumferential rotating bearing pedestal supports the bearing of the rotor lead screw to rotate;

wherein protruding splines are provided at an outer circumference of the axial spline nut and are axially connected with spline grooves on an inner circumference of the axial spline sleeve; the axial spline sleeve and the front lug are threadedly connected to form a whole for being mounted with an external frame; the lead screw supporting bearing, the rotor lead screw, the actuator housing, the front end cover, the front lug, the servo motor and the rear lug are sequentially mounted on the same axis.