Grinding method for irregularity of rail surface of high-speed railway steel rail welded joint within 3m range

The invention relates to a method for polishing irregularity of a rail surface of a high-speed railway steel rail welded joint within a 3m range, and belongs to the field of railway line engineering, which comprises the following steps of: firstly, determining an abnormal vibration section where the impact force of a wheel rail of a high-speed railway is too large or the noise of the wheel rail is abnormal; collecting rail surface irregularity data of a high-speed railway steel rail welding joint within a range of 3m in the abnormal vibration section; meanwhile, steel rail profile data within the 3m range of a steel rail welding joint needs to be collected, and the rail surface state is recorded. Then statistical analysis is carried out on the collected rail surface irregularity data, and a corresponding small machine grinding scheme is designed for an over-limit steel rail welding joint; according to the designed polishing scheme, small-sized polishing mechanical equipment is adopted to polish the irregulari