Production method of easy-to-roll high-formability ultra-high-strength cold-rolled steel plate

The invention discloses a production method of an easy-to-roll high-formability ultra-high-strength cold-rolled steel sheet, and relates to the technical field of cold-rolled steel sheets, and the production method comprises the following steps: (1) casting treatment; (2) hot rolling processing; (3) laminar cooling; (4) hot rolling and heat preservation; (5) pickling and cold rolling; (6) annealing and quenching; and (7) flattening and shaping. According to the production method of the easy-to-roll high-formability ultra-high-strength cold-rolled steel plate, the higher plate blank heating temperature is adopted, sufficient dissolution of C and N compounds is facilitated, the lower coiling temperature is adopted, fine precipitates can be obtained, a heat preservation cover is adopted for heat preservation to soften materials so as to facilitate cold rolling machining, then continuous annealing is adopted in the annealing process, and the production efficiency is improved. And a high annealing temperature is a