The invention provides a river historic morphology digital 
recovery method. The method comprises the steps of on the basis of selecting a 
river section in which the development of an alluvial 
stream and terraces is complete, selecting a representative cross section of a 
river section which is planned to be recovered, conducting 
sediment cylindrical sample drilling, conducting layering according to 
sediment physical characteristics, recording three-dimensional space coordinates of each layer, then performing age determination on each settled layer, finally conducting line connecting on the three-dimensional space coordinates of the settled 
layers with an identical age in different 
sediment columns on the same cross section in general drawing 
software, wherein obtained cross section morphology is river historic morphology under the age, and conducting line connecting on the coordinates of all ages in sequence, that is, morphology 
recovery of the whole cross section in all history ages is completed, and the historic morphology 
recovery of the whole 
river section is completed after multiple cross sections are recovered. According to the river historic morphology digital 
recovery method, a geology age measuring technology and a river dynamics cross section molding principle are cross, and the method can be applied to most alluvial river historic morphology recovery, and has important practical value for study of a river 
landform evolutionary process.