Low-error rotary sanding instrument and measuring method and application thereof

The invention discloses a low-error rotary sanding instrument and a measuring method and application thereof, and belongs to the field of sanding instruments. The rotary sanding instrument comprises a hood, a sand adding device, an annular track and a bulldozing assembly, the first end of the horizontal track is located on the inner ring of the annular track, and the second end of the horizontal track is movably installed on the annular track and does circular motion with the first end as the circle center. One end of the bulldozing driving piece is movably limited on the horizontal track and moves along the length direction of the horizontal track; the other end of the bulldozing driving piece is connected with the bulldozing plate. According to the measuring method, the rotary sanding instrument is used. According to the low-error rotary sanding instrument provided by the scheme, the horizontal track does circular motion on the annular track and drives the bulldozing plate to spread sand, so that the sand c