Rigid walking system of bulldozer

The utility model relates to a rigid walking system of a bulldozer. The rigid walking system comprises a trolley, a front cross beam, a rear cross beam, a main frame and bolts, wherein the trolley and the main frame are connected into a whole through the front cross beam, the rear cross beam and the bolts. The utility model has the benefits that the problem of poor operating stability of a small-sized bulldozer is eliminated, so that the operating stability of the small-sized bulldozer under complex working conditions is greatly improved; the operation is safer more reliable; the production and the manufacture are simple; and the adjustment is easy.