Cloth feeding amount adjusting mechanism of sewing machine

The utility model discloses a sewing machine cloth feeding amount adjusting mechanism which comprises an installation rack, a cloth feeding assembly and an adjusting shaft are rotationally connected to the installation rack, the cloth feeding assembly is rotationally connected with a U-shaped frame, a guide column is arranged on the U-shaped frame, a first reset piece enabling the adjusting shaft to rotate is arranged on the adjusting shaft, and a second reset piece enabling the adjusting shaft to rotate is arranged on the adjusting shaft. A guide sliding groove rotating along with the adjusting shaft is formed in one end of the adjusting shaft, the guide column is inserted into the guide sliding groove and can slide in the guide sliding groove, an adjusting assembly used for controlling the rotating angle of the adjusting shaft is further arranged on the mounting rack, and the adjusting assembly comprises an adjusting wheel and a stepping motor controlling the adjusting wheel to rotate. The adjusting wheel i