Conventional high-lift devices design is limited by many factors,so lift enhancing can not be obtained sufficiently,and then,it can not meet request on lift enhancing of aircraft.However,flow control can make up the shortage.In this paper, many kind of flow control is introduced from work principle,lift enhancing efficiency and the application by consulting much information.The flow control includes vortex generators on flap, spoiler deflected,ZHU's flap,self-activated movable flap,zero mass actuation,plasma actuators, MEMS technique, dynamical lift enhancing, and so on. The analysis results indicate that these flow control technique has great potential for improving lift enhancing efficiency of civil aircraft.