Abstract: Hengjin Reservoir is a second-grade water conservancy with primary purposes of flood control and irrigation. Flood prediction is very important to ensure the flood prevention safety of the reservoir. A flood forecasting scheme for Hengjin reservoir basin was constructed by using distributed Xin'anjiang model based on the daily (8 years of daily scale data) and the hourly data (25 floods). The application results show that: the maximum value of runoff depth relative error and flood peak relative error were less than 20%; the average values of the deterministic coefficients were 0.834 and 0.838 respectively; the time lag of flood peak was all within 2 hours, in both the regular rate and the inspection period. The qualified rate of 25 floods was 100%. Due to that there is no real measured flow process in the reservoir basin, the deterministic coefficient was only used as a reference. The qualified rate is only considered in the comprehensive evaluation, and the flood forecasting accuracy is Grade A. Therefore, the proposed forecasting scheme can be used as a reference for Hengjin Reservoir Basin.