The invention discloses a fast seedling method for introducing Prunus mongolica in loess plateau regions, comprising the following steps: step 1) of pre-processing; step 2) of soaking seeds; step 3) of drying; step 4) of sowing. The method has the following advantages: the Prunus mongolica plays an important role in development of grassland animal husbandry; seedling technology researches of rare and endangered Prunus mongolica in the loess plateau regions are protected remotely; and establishing a Prunus mongolica seed bank is important for protection of the Prunus mongolica. The method plays a positive role for effective utilization and protection of genetic resources of the Prunus mongolica in arid and semi-arid regions, and fills technical gaps for fast breeding the Prunus mongolica in the loess plateau regions. The method is important for mass propagation of the Prunus mongolica in the loess plateau regions and protection of ecological environment and biodiversity in desert regions, and is featured with very significant ecological benefits, social benefits and economic benefits.