Selfpropelled hydraulic transporter is the key device of largescale equipment. As the feature of the equipment is high, wide and overweight,it is important to ensure their safety during transport operation. A new method of fourpoint support called “flat chasing style ” leveling strategy was proposed according to the weak leg of selfpropelled hydraulic transporter. The control logic of the automatic leveling process was designed. The test on the selfpropelled hydraulic transporter shows that this method can prevent the situation of weak leg effectively and progress the speed and safety of automatic leveling process.