Based on the perturbation theory, the fine structure formula of hydrogen energy level is deduced. It accords with the result of experiments and the conclusion drawn by Dirac theory.

• 本文用微扰论方法；推导氢原子能级精细结构公式；其结果同用狄拉克(Dirac)理论的推导结果相一致；均与实验相符合.