[Objective] To explore the spatial distribution of rain flood pattern in order to provide references for the construction of sponge city.[Methods] A GIS database was established, combined with ArcGIS simulation, SCS-CN and SWMM models, the characteristics of runoff and flood distribution were quantitatively analyzed in Luohe planning area.[Results] Total runoff and runoff coefficient (equal), runoff volume, total peak, inundation area of Moran's I coefficient was 0.338 (p<0.001), 0.142 (p<0.001), 0.101(p<0.001) and 0.918 (p<0.001), respectively, indicated that the distribution of runoff and inundation had a remarkable agglomeration. The impact of land type and pipe network distribution on runoff was greater than that of accumulated water process, but the influence of topography was opposite. Total runoff and runoff coefficient were decreased from center to outside. Total peak and runoff volume were affected by catchments area and pipe network distribution. The impermeable surface of the runoff high risked area accounted for 82.73% of the total area. The runoff risk decreased from center to outside. The catchment area of runoff coefficient > 0.7 and the inundation area > 70% were concentrated in the urban center. Agricultural land, urban green space and road land were the main types of land use in the inundation area, accounting for 36.56%, 21.39% and 21.82% of the total area, respectively, and there were significant difference in the distribution characteristics.[Conclusion] Urban surface change was closely related to the distribution of runoff and inundation. The comprehensive quantification method could directly reflect the characteristics and trends of urban flood pattern.