In order to reduce the deformation of complex structural parts caused by NC machining, and to meet the requirement of adaptive adjustment of fixtures, an adaptive control method is proposed based on the machining principle of floating fixture. The floating fixture units communicate with each other by CAN (Controller Area Network) bus. Part condi-tion monitoring method based on multiple sensors is developed, machine tool condition is monitored based on OPC tech-nology, the floating fixtures and CNC machine tool interact based on PLC. The floating clamping adaptive control system is developed. The adaptive control system for floating fixtures has been verified in the aviation manufacturing enterprise during the machining of aircraft structural parts, the control system can realize the adaptive adjustment of floating clamping and meet the industrial application requirement.