The invention discloses a satellite rainfall and actually measured rainfall error partition fusion correction method, and belongs to the technical field of satellite rainfall data precision correction. The related correction method relates to values of each station and each moment, can effectively solve the problems of excessive estimation or underestimation, missing report in a small-value area and the like of satellite rainfall monitoring, and remarkably improves the precision of the satellite rainfall data precision correction method. The correlation between the hourly satellite rainfall data corrected by the method and the hourly actually measured rainfall data reaches 0.9 or above, which meets the flood forecasting precision requirement, and continuous observation of large-range rainfall can be achieved due to wide space coverage and high temporal-spatial resolution, and large-area continuous rainfall distribution is obtained, and the method can be better used in the fields of hydrology and the like, and has a good application prospect in areas with sparse ground stations and even without data.