Mowing height adjusting device of mower

The utility model discloses a mowing height adjusting device of a mowing machine, which belongs to the field of mowing machines and comprises a machine body, rollers are symmetrically mounted at the bottom of the machine body through bearings, a collecting box is mounted on the rear side of the machine body, a power mechanism is arranged at the top of the machine body, and a power shaft is mounted at the output shaft end of the power mechanism. The power shaft is arranged on the inner side of the machine body, a sliding barrel is installed on the lower side of the outer surface of the power shaft and connected with the power shaft through a key, blades are evenly arranged at the bottom of the sliding barrel, a shaft sleeve is installed on the outer side of the top of the sliding barrel through a bearing, the surface of the power shaft is sleeved with a spring A, and the bottom of the spring A makes contact with the upper surface of the shaft sleeve. The top of the spring A makes contact with the upper surface