The invention discloses a method for analyzing the post-dynamic recrystallization process of high-strength steel and belongs to the field of plastic forming. The method comprises the following steps that 1, a cylindrical sample is prepared; 2, a single-pass compression experiment is conducted at different deformation temperatures, strain states and deformation, and after the deformation of the sample reaches a preset value, the sample is quenched immediately; 3, the quenched sample is sliced in the axis direction of the sample; 4, slices are subjected to infrared heating to the target temperature in a high-temperature laser confocal in-situ observation experiment and then subjected to heat preservation, real-time in-situ observation is conducted, and metallograph in the metallographic structure changing process is shot; and 5, the grain sizes and dynamic recrystallization volume fractions at different time are obtained through the metallograph, and then the influence of different parameters on the post-dynamic recrystallization process is analyzed. According to the method for analyzing the post-dynamic recrystallization process of the high-strength steel, a thermocompression experiment method and an in-situ observation experiment method are combined, real-time dynamic observation can be achieved, experiment precision is improved, materials are saved, the period is shortened, and the cost is lowered.