Based on the meteorological data of four typical weather stations in 56 years,the vertical climate change trend and characteristics of the northern slope of Tianshan Mountain were analyzed and discussed with the help of mathematical statistics,so as to find out the vertical differentiation processes of climate change response in this region.The main results are as follows:① The temperature of the northern slope of Tianshan Mountain showed an upward trend:the higher the altitude,the more obviously the temperature increased.While temperatures increased all year round in the high altitude area,winter warming was most obvious in the lower elevations.And 1984 witnessed the lowest temperature on the northern slope of Tianshan Mountain.② The precipitation showed an upward trend there.The precipitation increase was greater in the lower altitude area.And with the increase of altitudes,the trend of humidification increase would decline slightly.Moreover,the precipitation in winter increased obviously.③ Abrupt climate change was obvious with the change of seasons and altitudes.