Aiming at the problem of over rotation in the daily maintenance of the wheels， a new standard is proposed to optimize the rotation design. On the basis of geometric model， using the proportionality coefficient to optimize the reduction of flange thickness and wheel diameter， this paper makes the reduction of flange thickness less， while the wheels can be fixed to the standard outline size. On the basis of the longterm record data of CRH2A type car’s LM type wheel， the optimum proposal makes the reduction of flange thickness less and avoid over rotation at the same time， compared with traditional solution. This optimization program can not only greatly improve the life of the wheel， but also reduce the unnecessary cost caused by over rotation， and have very important practical application values.