Abstract: Paddy field shelter belt is a green barrier to protect paddy field from wind, the distribution of paddy field shelter belt spatial density can be reflected in terms of regional distribution of paddy field, paddy field protection forest spatial density distribution of paddy field protection forest construction planning and paddy yield research is of great significance. The author made Qianguo irrigation area in Jilin Province as the research area, mainly focused on the spatial density distribution of shelter belt of paddy field in irrigation area, and extracted the shelter belt by supervised classification on the basis of remote sensing image data, validated the kappa coefficient was 0.87, according to the classification of the data extraction paddy field shelter belt area of 110.945 km2, total circumference of 4998.095 km. Grid method was used for irrigation area shelter belt data space density analysis, concluded that paddy field in the irrigation area of shelter belt spatial density distribution, according to the current density distribution were analyzed, concluded that in Qianguo irrigation paddy field, uneven distribution of shelter forest shelter forest southern key distribution in irrigation area, northern new area in shelter forest distribution, which constituted a adverse effect on irrigation rice yield.