[Objective] The rainwater collection capacity of the rainfall collection and infiltration irrigation system of the red plum apricot economic forest in the Pengpu Town of Yuanzhou District, Guyuan City, Ningxia Hui Autonomous Region were investigated, in order to clarify the characteristics of rainfall distribution and provide a scientific basis for the quantitative study of rainfall collection and the development of rainwater-harvesting agriculture in the area.[Methods] The local red plum apricot was used as the research object. Based on the measured data of natural rainfall and artificial simulated rainfall, the rainfall collection process for the red plum apricot economic forest was observed and simulated.[Results] From July to September 2019, 19 rainfall data were observed at the red plum apricot base in Pengpu Town, and the number of rainfalls of less than 5 mm accounted for 83.3% of the total natural rainfall. The correlation coefficient between natural rainfall and artificial rainfall was 0.91, the total collection rate was 61.29%, the interception rate of the infiltration irrigation system was 27.12%, and the canopy interception rate was 11.95%.[Conclusion] The small rainfall frequency in the test field was high, the two rainfall methods had a high similarity, and the rainfall collection and infiltration irrigation system had a high collection efficiency. The rainfall collection of the infiltration irrigation system was linearly related to rainfall (R²=0.995 5), and the rainfall collection rate was logarithmically related to rainfall (R²=0.693 9).