The embodiment of the invention discloses a wheel rail horizontal force measuring method and measuring system. The measuring method comprises the steps of collecting the wheel set acting force of eachhorizontal force measurement point and the wheel set acting force of each shearing force measurement point in a unit measurement interval, and calculating the wheel track horizontal force acting on the unit measurement interval according to the wheel set acting force of each horizontal force measurement point and the wheel set acting force of each shearing force measurement point. In the embodiment of the invention, the continuous wheel rail horizontal force is obtained by increasing constraint conditions, dividing the unit measurement area and combining horizontal force of each unit measurement area, the wheel rail horizontal force is continuously tested, and the test precision of the wheel rail horizontal force is improved.