The invention belongs to the technical field of manufacturing of cold-rolled steel plates and particularly relates to a treatment method of a high-strength cold-rolled steel plate. The treatment method specifically comprises the following steps of (1) immersing the cold-rolled steel plate into a sodium sulfite aqueous solution for immersion cleaning, introducing voltage to conduct electrolysis and taking out the cold-rolled steel plate to obtain a pretreated cold-rolled steel plate; (2) treating the pretreated cold-rolled steel plate with cold plasmas generated after atmospheric dielectric barrier discharge, putting the cold-rolled steel plate into a baking oven for baking and then taking out the cold-rolled steel plate to obtain a primary treatment cold-rolled steel plate; and (3) immersing the primary treatment cold-rolled steel plate into treating fluid for treatment, taking out the cold-rolled steel plate, conducting vacuum treatment on the cold-rolled steel plate, taking out the cold-rolled steel plate and conducting hot-pressing drying on the cold-rolled steel plate. The treatment method breaks through the traditional process and is simple. Cohesion force of components of the cold-rolled steel plate can be effectively enhanced, and the compactness of the cold-rolled steel plate is improved. Accordingly, the yield strength and tensile strength of the cold-rolled steel plate are effectively improved. The elongation, the n value and the r value of the cold-rolled steel plate are effectively increased. The cold-rolled steel plate is resistant to cracking, fracture and deformation. The corrosion resistance performance and wear resistance of the cold-rolled steel plate are effectively enhanced. The using effect of the cold-rolled steel plate is effectively improved. The service life of the cold-rolled steel plate is prolonged.