The invention relates to a mounting device of a sand-scattering trackclearer for a rail vehicle. The mounting device is composed of a mounting arm, a bracket and a mounting plate. One end of the mounting arm is horizontally and fixedly mounted on the lower portion of a shaft box body through bolts, the other end of the mounting arm is fixedly connected with the bracket, and the bracket extends towards the right front direction of wheels. The mounting plate is fixed to the front end of the bracket, and a sand-scattering device and an obstacle removal plate are fixedly mounted on the mounting plate. The mounting device of the sand-scattering trackclearer for the rail vehicle is simple in structure, convenient to mount and adjust and capable of effectively ensuring the mounting accuracy and the obstacle removal effect.