New program was proposed in LM-6 rolling control technology that using high-pressure staged combustion gas.Launch vehicle rolling control by just one engine was realized.Under the limit of the rolling control moment of the launch vehicle,a new attitude dynamic model is established.Interference source and how to reduce the effect was analyzed,and method of designing a pre-compensated robust controller was proposed.Simulation and flight results showed that the attitude dynamic model established and the pre-compensation robust controller proposed in this paper could solve the key problems with a strong coupling attitude controller,and realize high quality and high reliability control in wind areas,and improve the capability of the launch vehicle. New program was proposed in LM-6 rolling control technology that using high-pressure staged combustion gas. Launch vehicle rolling control by just one engine was realized. Unit limit the rolling control moment of the launch vehicle, a new attitude dynamic model is established.Interference source and how to reduce the effect was analyzed, and method of designing a pre-compensated robust controller was proposed. Simulation and flight results showed that the attitude dynamic model established and the pre-compensation robust controller proposed in this paper could solve the key problems with a strong coupling attitude controller, and realize high quality and high reliability control in wind areas, and improve the capability of the launch vehicle.