Research conclusions: The paper elaborates the development and planning of Chinese heavy haul railway network， presents the principals ought to be followed when planning the heavy haul corridors． Take the railway maximum income as the object function and take the line carrying capacity as well as the investment limit as the constrains，an investment decision － making for heavy haul transformation and cargo flow distribution model based on path selection as well as the solution method are proposed． The model makes the decision of rail heavy haul transformation more reliable．