Fluid drag reduction research has always been a hot spot and front research,and the power consumption is particularly acute when paddy field machineries move on the surface of mud.In this paper,combining the theory of bionic drag reduction,characteristics of fluid drag reduction was analyzed about Ctenopharyngodon idellus surface scales,the surface microstructure was observed by scanning electron microscopy(SEM),and main characteristic parameters of micro unit body and 3D simplified bionic model was established and built.