Abstract: Based on the daily rainfall observation data from 60 meteorological stations in Liaoning province and the monthly global reanalysis data of the NCEP/NCAR (the National Centers for Environmental Prediction/National Center for Atmospheric Research) from 1986 to 2015,the regional division of volume capture ratio of annual rainfall runoff and its spatial variation in Liaoning province were analyzed.Results show that the volume capture ratio of annual rainfall runoff in Liaoning province can be divided into II division,III division IV division,and V division.There is one more division-the V division,than those in the“Sponge Urban Construction Technology Guide-Low Impact Development of Rainfall System to Build”,and the spatial distribution for the same division of these two studies differs apparently.The proportion of total rainstorm in total rainfall is closely related to the regional division of volume capture ratio of annual rainfall runoff.The characteristics of water vapor transportation and topography in Liaoning province are the internal causes for the regional distribution differences of the division of volume capture ratio of annual rainfall runoff.