The invention discloses a flow stabilization device for avoiding a UAV crash. The flow stabilization device comprises a mounting seat, a sleeve, a connection member, an elastic member, and a pluralityof flow stabilization plates, wherein the lower end of the connection member is connected to the mounting seat; a mounting hole is disposed on the upper portion of the mounting seat; the sleeve is disposed in the mounting hole and sleeves the outer side of the connection member; the elastic member is arranged between the inner upper end surface of the sleeve and the connection member; the elasticmember is in a pre-compressed state so that the sleeve has an upward movement trend; the sleeve is provided with a locking structure for restricting the upward movement of the sleeve; the plurality of flow stabilization plates are connected to the whole circumference of the upper end of the sleeve through a rotation shaft and are foldable. The flow stabilization device disposed on a UAV can reduce the ground impact force on the UAV after the UAV crash, thereby improving the flight safety and the crash resistance of the UAV.