The profile of sediment flow of paleo flood had been found in TJZ of Yun County in the upperstream of Hanjiang river. From the analysis of physical and chemical properties and its OSL dating age, the paper found that the profile recorded four paleo flood events, which occurred before 12 600 to 12 400 years, 4 200 to 4 000 years., 3 100 to 3 000 years and 1 900 to 1 800 years.Through the hydrological information of slackwater deposit, the four paleo flood discharges were calculated by HEC-RAS model, they were 54 920, 51 300, 43 500 and 37 050 m3/s.Then by use of the data of gauge flood, the data of gauge and historical flood,the data of gauge and historical together with palaeo flood,the paper set up the frequency of flood series of different time scales. The results showed that the palaeo flood data being connected with the gauge and historical flood data prolonged the flood data sequence and also advanced the credibility of flood frequency calculation.The result has important realistic significance for studying palaeo flood records in sedimentological evidence. It is not only to gain long-time scales flood data, but also provided important hydrological data for the construction of water conservancy and cross river traffic, flood control and utilization in the upperstream of Hanjiang river.