Bulldozer and bulldozer scarifier

The utility model relates to a bulldozer scarifier. The bulldozer scarifier comprises a scarifier support frame, a pin sleeve and a scarifier tooth top, wherein the scarifier tooth top is installed on the scarifier support frame through the pin sleeve, and the scarifier support frame and the scarifier tooth top are in surface contact. A section of the scarifier tooth top is of an I-steel shape, and the thickness and the width of the rear side of the section of the scarifier tooth top are both larger than the width of the front side of the section of the scarifier tooth top. The utility model further discloses a bulldozer. The bulldozer comprises the bulldozer scarifier and has the advantages that the surface contact is adopted between the scarifier tooth top and the scarifier support frame, most pull force is conveyed to the support frame in the process of working, and therefore the bearing force of the tooth top is improved, and the wear-resisting performance of the bulldozer is improved. The section of the