Abstract: Using the data of the maximum frozen soil depth in Altay City, the author analyzed the annual and monthly variability of the maximum frozen soil depth in winter, and the impact of the frozen soil depth on the growth period of spring wheat. The results showed that: during the 52 years, the trend of the maximum frozen soil depth in winter was decreasing year by year with a decreasing rate of 2.84 cm/10 a ; the annual maximum frozen depth appeared in February and March; the trend of the growth dates of spring wheat was decreasing with a decreasing rate of 3.97 d/10 a; The effects of the maximum depth of frozen soil on growth period (except the whole growth period) were negative (b<0), which meant that the growth periods shift to an earlier date (postponed) with the decreases (increases) of the maximum depth of frozen soil; the effects of the maximum depth of frozen soil on the growth period of spring wheat were positive with a delaying rate of 3.01 d/10 cm.