Food security plays an important role in China’s agricultural production and national security，so space breeding has played an important role in the breeding of rice，wheat and corn，the three major staple crops in China. Among the more than 200 national and provincial main grain crop varieties，space rice accounts for more than half of the total. Luyuan 502，the second main wheat variety in China，is a new wheat variety produced by selecting parents from the preferred material of the space mutant line. In maize breeding in China，the germplasm resources created by space breeding have developed various maize inbred lines and new varieties，which have become the main varieties of the country or province. In vegetables and cash crops，space breeding has also created a large number of germplasm resources and economic benefits. The space forage has filled the blank of high quality and high yield forage in China. In some plant species that do not involve food safety，such as forest，grass and flowers，there is a greater demand for space breeding，and there have been a large number of new varieties in flowers. Based on the differences in genome research and breeding level among different crops，spatial mutagenesis can be fully used to obtain beneficial mutants in plant categories with insufficient research depth and low breeding level，such as the creation of Chinese herbal medicine germplasm resources.