Rolling and preparation method of magnesium alloy sheet

A method for producing magnesium alloy sheets, comprising the following steps of:

• 1) preparing rolled magnesium alloy billets by a rough rolling, wherein a reduction of each pass is controlled to be 10-30% and a rolling speed of each pass is controlled to be 10 m/min to 45 m/min,
• 2) effectively hot-rolling the rolled magnesium alloy billets to at least a target level, wherein rolling speed in each rolling pass is 10-50 m/min, rolling reduction in each rolling pass is controlled to be 40-90%, and the rolled magnesium alloy billets are preheated 1-15 min before rolling in each rolling pass, and a temperature of the preheating before rolling and a temperature of rolling in each rolling pass are controlled to be 250-450° C., and
• 3) annealing at an annealing temperature of 150-400° C. and annealing time of 10-300 s.