Process capable of obviously improving room-temperature forming property of AZ31 magnesium alloy plate

The invention discloses a process capable of obviously improving the room-temperature forming property of an AZ31 magnesium alloy plate. The process comprises the procedure of rolling, shearing and continuous bending deformation, the AZ31 magnesium alloy plate is subjected to hot rolling for deformation through a roller, and the power is provided by utilizing the friction force generated by rolling deformation, so that the plate is cut and is subjected to continuous multi-pass bending through a multi-step mold which has equal rolling channel height and continuous bending channel so as to realize composite deformation; the inner fillet radius r1 and the outer fillet radius R1 of a first corner of the multi-step mold are far smaller than the inner fillet radiuses r2, r3......rn and the outer fillet radiuses R2, R3.....Rn of a second corner, a third corner......an Nth corner, wherein r2=r3=......rn, R2=R3......Rn, usually, r1 is more than or equal to 2mm and is smaller than or equal to 4mm, and r2=r3=......=rn is more than or equal to 8mm. According to the process, the structure of the AZ31 magnesium alloy plate can be further improved, the room-temperature forming property of the AZ31 magnesium alloy plate can be obviously improved, and the production efficiency is improved.