The present invention relates to a polishing machine sandpaper, it belongs to mechanical engineering area. This time the existing grinder to grind on surfaces with different curvature of the operation is inconvenient and inefficient tasks solved this problem. Sandpaper abrasive machine of the present invention is the output of the center portion and the motor includes a motor and connected to the support. Connection support shaft fixed connection. The rotating around several possible connections support grinding wheel chairs Connect support is installed. The edge surfaces of each grinding wheel is connected to the support each have a different curvature. Each grinding wheel is connected to the support are distributed on the same circumference of the motor output shaft distally. It also supports connecting the motor to rotate the engagement of the dog in the back of the sandpaper abrasive grinding wheel support of the connection and the location. Sandpaper abrasive machine of the present invention enables a continuous grinding process for multiple curved surface.