The invention discloses a rolling process plate form control method for high-strength steel with the thickness specification being 6 mm or below. The plate form control method comprises the procedures of heating, rough rolling, finish rolling, controlled cooling and hot straightening. In the heating and rolling processes, the integral temperature uniformity of a casting blank and an intermediate blank and structure state uniformity after phase changes happen are sufficiently considered, and the problems that in the medium-thick plate steel ball rolling process, due to the reason in the aspect of the technology, stress is uneven, stress is generated due to the uneven temperature and the structure difference, and consequently irregular deformation is caused are solved. According to the plate form control method, the blank thickness compression ratio is smaller than or equal to 20, the elongation ratio is smaller than or equal to 16.5, and the lateral spread ratio meets the formula: 1.0<=W<=1.4; the thickness of an obtained steel plate is smaller than or equal to 6 mm, and according to the steel plate performance, the yield strength is larger than or equal to 355 MPa; and the surface irregularity of the steel plate is smaller than or equal to 8 mm/2m.