Male sterility is the main way of crop heterosis utilization and had the important value of production. Malesterility included nuclear male sterility and nuclear and cytoplasm interaction male sterility. Nuclear and cytoplasminteractions male sterility accounts for the most in crop production. Breeding of male sterility lines must focus on theabilities of germination, high external stigma rate and vitality and crop yield, low self-fertility percentage and abor-tive rate. In this essay, types of crop male sterility, characters of excellent male sterility lines, the regarded questionsof breeding were reviewed, which will provide reference for breeders.