There are some problems in the traditional analysis of riverbed evolution，such as heavy workload，no professional auxiliary tools，low production efficiency，difficulty in collecting river bed topography data over the years，high cost of measured maps，and scarcity of moving bed evolution data. Aiming at the above problems，a set of professional methods suitable for river channel analysis is developed by using the secondary development technology of Civil 3D，which successfully realizes the functions of intelligent mapping of river bed evolution and intelligent calculation of scouring and silting amount. Through BIM + GIS river simulation analysis technology，the river performance rules are summarized，the regulation scheme layout is assisted，the rationality of design is verified，and the problem of difficulty in the layout of the movable bed waterway regulation plan is preliminarily solved. The analysis technology greatly improves productivity and provides references for similar projects.