Abstract: The increase of oil level is a problem of gasoline direct injection engine at freezing area. The research was carried out to study the mechanism and solution of the problem. Selecting some test vehicles from three different manufacturers,the outdoor experiments were carried out in Heihe district. In the experiment, the change of oil level, oil temperature and cooling water temperature were recorded. Taking the oil level height and oil level rise rate as criterion to evaluate the influencing factors of oil level rise, the main influencing factors of oil level rise were analyzed separately through variable control. The results of the experiment show that the fuel injection mode and temperature rise speed of engine are main reasons of the rise of oil level. The increase of injection times and engine temperature rise speed can reduce the rise rate of oil and speed up the oil level to balance.