The invention relates to a method for improving the laser patterning processing uniformity, and belongs to the technical field of laser application. According to the method for improving the laser patterning processing uniformity, a to-be-processed pattern is disassembled into a series of sub-patterns by adopting an interlacing splitting method, a phase diagram of each sub-pattern is calculate according to a Fourier iterative algorithm, then the phase diagrams are sequentially loaded into a spatial light modulator to obtain shaping light fields, the sub-pattern corresponding to each shaping light field is processed on a material by using the shaping light fields, and the sub-patterns are finally combined into the complete processing pattern. In this way, the problem of uneven energy deposition caused by spot noise of the light field when a single phase diagram is adopted for carrying out laser space light field shaping processing is solved, and then the purpose of improving the laser patterning processing uniformity is achieved. The method is simple in principle, the uniformity of a processing result is remarkably improved, and the method has strong practicability; and the method for improving the energy deposition uniformity by performing interlacing splitting on the to-be-processed pattern can play an important role in laser space light field shaping and patterning processingbased on the spatial light modulator.