The utility model discloses a super high earth -rock dam soil stone classification device belongs to native building stones screening plant field, provides a simple structure, low cost, and convenient operation's native stone classification device, including base, truss and inclined plane board, truss installation is and support the inclined plane board on the base, inclined plane board slope sets up, slope contained angle theta between inclined plane board and the base place horizontal plane is between 30 to 45. The utility model discloses simple structure, convenient operation, low cost moreover. Utilize the natural separation effect of inclined plane board, the great gravel soil building stones of particle diameter will cover in toe mound upper strata, and the less gravel soil building stones of particle diameter will be located the lower floor, can reach the grading effect to native building stones like this. In addition, inclination through rationally setting up the inclined plane board to and the roughness isoparametric, can so that isolate lie in the requirement that the less gravel soil building stones of the particle diameter of lower floor satisfy the native building stones P5 content of super high earth -rock dam prevention of seepage.