Bulldozer is a kind of earthwork machinery that can excavate, transport and discharge waste rock and soil. It is widely used in open-pit mines. For example, it is used for the construction of waste dump, the leveling of automobile waste dump, the stacking of scattered ore and rock, the leveling of flat plate and construction site, etc. It can be used not only for auxiliary work, but also for main mining work. For example, the stripping and mining of placer deposits, the traction and boost of scraper and rock plough, and cooperating with other earth moving machinery to reduce the stripping step height when there is no transportation mining method.