Based on the data of snowfall, daily average temperature, daily maximum temperature and daily average wind speed of 43 stations in Northern Xinjiang, the model of ice-snow sport climate index (ISCI) was used to evaluate the climatic suitability and its variation character of winter-spring ice-snow sport in Northern Xinjiang from 1961 to 2017. The results are as follows. (1) The most stations in Northern Xinjiang were suitable for ice-snow sport, the best suitable stations generally distributed in Altay region, but the suitability degree was relatively lower in most stations of Yili Valley, Alataw Pass and Dabancheng etc. (2) All of the stations are suitable for ice-snow sport with altitude above 1200 m. Climatic suitability of ice-snow sport was not linear relationship with snowfall. The station amount of very suitable and unsuitable for ice-snow sport will both enlarge with winter-spring average snowfall increase in Northern Xinjiang. (3) Yearly differences of ISCI are obviously. The regional average ISCI is decrease with time, but the linear change trend of ISCI is increase at some stations but decrease at the others. The suitable stations for ice-snow sport are reducing widely than before 1998. (4) Stations in Altay region are suitable for ice-snow sport in all time stages. Especially in the north of Altay, the ISCI are increase with time stage, whereas the ISCI are decrease periodically at the most stations of Yili Valley.

Keywords： Ice-snow sport; Climatic suitability; Spatial distribution; Yearly differences