The utility model relates to an ecological bank protection based on tortuous channel belongs to the eco -hydrology research techniques field. Divide the ecological bank protection level of river course both sides into multiple modules, including left bank lower floor module, left bank middle level module, left bank upper strata module, right bank lower floor module and right bank upper strata module. Left bank lower floor module, left bank middle level module and left bank upper strata module are from bottom to top arranged at the left bank in river course from the river course in proper order, right bank lower floor module and right bank upper strata module from bottom to top arrange at the right bank in river course from the river course in proper order. The utility model discloses difficult point to the protection of crooked river ecologic divides the bank protection horizontal direction into multiple modules, and the usage is different between each module, is close to the module in river course most and mainly plants the plant that the soil and water conservation ability is stronger, cooperates the aquatic plant who lays simultaneously in the river course, plays the effect of the crooked river ecologic environment of protection, the middle level can divide a plurality of submodule pieces into, develoies hydrological experiment research, and main planting the in upper strata is beautified the environment or economic crop.