Research conclusions：(1)The sharing law of train loads is not effected by the axle loads and the structure of subgrade, train loads are shared by 5 sleepers for single axle wheel, shared by 8 to 9 sleepers for double axle wheels and shared by 15 sleepers for four axle wheels.(2)Wherever the axle load is acted directly above or on any position between the two sleepers, the shape，size and properties of Gauss function curve fited for the loads sharing remain the same, only the position moves as the position of the axle loads.(3)Under single axle wheel the stress ratio between dynamic stress produced by train loads and gravity stress of subgrade is about 0.2 which meet the design principle, while under multi axle wheels the ratio is between 0.3 to 0.5 which does not meet the design principle. (4)The above conclusions have important guiding significance to the structure design of heavy haul railway subgrade.