The invention relates to a method for preparing pale malt containing high-activity limit dextrinase, which comprises the following five steps: selecting barley, pretreating a barley raw material, soaking barley, germinating, and drying green malt. The germination step is carried out in low-temperature and ventilation conditions, metal ions and a germination accelerator are added in the initial stage of germination, and the germination process is regulated and controlled, so that pale malt containing high-activity limit dextrinase is prepared. The method provided by the invention has the advantages of simple process and is stable in operation, and the limit dextrinase, alpha-amylase and beta-amylase in the malt finished product have high activity and proper proportion. The invention provides a new route for producing high-fermentation degree beer with industrial production scale and commercial value.