Motor axis encoder connecting structure capable of reducing temperature rise of encoder

The utility model provides a motor axis encoder connecting structure capable of reducing the temperature rise of an encoder, which enables a rotating shaft to be connected with the encoder through a fixing block, so that a physical isolation part exists between the rotating shaft and the encoder, the temperature rise of the encoder is reduced, the normal work of the encoder is ensured, and the service life of the encoder is ensured. The device comprises a rotating shaft; the fixing block comprises a cylindrical table and a mounting convex column, concave positioning hole grooves are annularly distributed in the cylindrical table, a concave fastening hole is formed in the center of the front end of the mounting convex column, and a concave positioning groove is formed in the center of the rear end face of the cylindrical table; and an encoder; the center of the tail end of the rotating shaft protrudes forwards to form a positioning protruding column, a front protruding positioning ring is arranged in the cente