In view of the corrosion phenomenon of bulldozer fuel tank, the main measures to prevent corrosion of fuel tank are put forward. The process route of fuel tank was improved. The parts were pickled and phosphated after welding instead of pickled and phosphated after welding. Control degreasing, pickling, neutralization, surface adjustment and phosphating processes; Perform regular maintenance on stock bulldozers. The corrosion probability of fuel tank can be significantly reduced by implementing various anti-rust measures.