Abstract: Accidents often happens in oil product handling procedure and transportation periods of tankcar. The article represents four typical cases of accident and makes analysis to them individually. It is pointed out that the main reason for accident happened resulted from operator's carelessness and misoperation, as well as oil leakage and static discharge from equipment failure; most attention shall be paid to the accident caused by oil loading transforming. By summarizing experience, it is pointed out that the equipment used must conform to specifications and safety requirements; raise safety consciousness of the operators, strengthen the study on safety acknowledge, raise operating level so as to stop all major accidents occurred on tankcar of oil product.