Electric cylinder capable of achieving lead screw and nut floating centering ant-clamping function

The invention relates to an electric cylinder capable of achieving the lead screw and nut floating centering ant-clamping function. The electric cylinder comprises a motor fixedly connected to one end of a cylinder barrel, a piston and a piston rod are coaxially arranged in the cylinder barrel, an output shaft of the motor is in driving connection with a lead screw, the piston is fixedly connected with one end of the piston rod, the lead screw is arranged in the cylinder barrel, and a nut is in transmission connection with the lead screw and arranged on the piston. The nut is driven by the lead screw to do reciprocating sliding in the cylinder barrel along the lead screw, therefore, the piston rod is driven to stretch out and draw back in the cylinder barrel, a guide sleeve and a gland are arranged between the extending end of the piston rod and the cylinder barrel, a piston cover is arranged at one end of the piston, the two sides of the nut are oppositely clamped and restrained through the piston and the pi