Abstract: The soil adhesion characteristics of a 35 steel and its influencing factors were experimentally tested and arranged by the regression design technique. The results obtained show that heat treatment can alter the soil adhesion characteristics of the specimens,but the hardness obtained affects the adhesive force in different ways for specimens with higher hardness and specimens with free ferrite in structure. It is also shown that the contact angle of water on the surface of the metallic material is a rather important factor influencing the adhesive force. A dual-phase microstructure containing free ferrite has a lower value of adhesive force.