Height adjusting device of small mower

The utility model relates to a height adjusting device of a small mower and belongs to the field of mowers. The device mainly comprises a rack of the mower and is characterized in that a front axle and a rear axle of the mower are respectively provided with a left rocker panel and a right rocker panel that are provided with a travelling wheel through a rotating shaft; the two rocker panels of the front axle are connected with the two rocker panels on the rear axle through connecting rods; and the front axle is also provided with a poking plate with a handle. By raising or lowering the rack, the height of a cutter head can be adjusted and the aim of adjusting the mowing height can be achieved. The device is flexible and convenient in height adjustment and wide in adjustable range, and has the effects of simple structure and strong adaptability to grasslands.