Abstract:The burning accidents of insulation joints often occur in high-speed railway stations. The wheel-rail contact resistance is an important index to cause the burning loss of insulation joints by wheel-rail arc,Therefore, accurate calculation of contact resistance is an important basis for analyzing the burning loss of insulation joint .The size of the contact resistance mainly depends on the area of the wheel and rail contact spots. For this, calculate the wheel-rail contact area under different working conditions by ANSYS, Analysis of the influence rule of the train axle load and offset on contact spot area, The results show that when axle load increases from 9t to 27t, the wheel-rail contact resistance decreases by nearly 34%. The wheel-rail contact resistance decreases by 25% when the lateral displacement increases by 6mm. The change of wheel-rail contact resistance presents same trend with the increase of axle load and wheel-rail contact resistance.