The splits window algorithm is used to retrieve the snow surface temperature from MODIS IB data through redeveloping the ENVI software. The details of image processing and programming are given. Taking the northern Xinjiang as an example, the approach is used to calculate the snow surface temperature, and the retrieved results are compared with the observed snow temperatures from automatical meteorological stations. The comparison indicates that the retrieved snow surface temperature distribution is consistent with observed one, and the average error is 1. 73 ℃ , which is acceptable, can basically reflect the distribution of snow surface temperature over the northern Xinjiang. With the method, the batch processing of remote sensing data can be realized, so to build a long time sequence rapidly and accurately.%针对MODIS数据的分裂窗算法进行了简要介绍,通过ENVI(ENvironment for Visualizing Images)二次开发,实现了直接利用MODIS 1B数据进行雪面温度反演.在ENVI二次开发环境下,编程实现了该算法,并给出了具体的数据反演处理流程.以我国新疆北部为例,将反演结果与气象站雪面温度观测资料对比.结果表明:系统反演得到的雪面温度分布规律与观测资料一致,反演的平均误差为1.73℃,基本反映了北疆地区的雪面温度分布情况；利用ENVI二次开发可以实现遥感数据的批量处理,从而快速准确地得到一个长时间序列的结果.
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