Abstract: The signs of low temperature actix，ate the expression of some freezing tolerant genes of plant and the contents of specific proteins and osmotic adjustment substances are raised，all of which elevate the antioxidant capacity and the osmotic adjustment capacity and protect the plant cells，thus the expression of some freezing tolerant genes is the determinant of the antifreeze capacity，so it is critical for breeding antifreeze traits that enhances the level of the expression of freezing tolerant genes．Finally，the view of this domain in future is presented．