The automation forming technology of composite materials had become the most effective method and simplest approach due to the high efficiency and low cost.For the purpose of improving traditional low production efficiency and poor quality stability,by using self-designed mechanical forming equipment of composite stingers,the effects of process parameters such as the forming rate and forming temperature on the quality of forming parts are studied.The optimum forming parameters for[90°/45°/0°/-45°]_2s L-type parts are obtained through characterizing the thickness of the corner,the fiber volume,the porosity and fiber deformation by size measurement and metallographic analysis,i.e forming rate of 1 to 3 mm/min,forming temperature of 97 ℃ when the forming space is 2.99 mm.Under this condition,the parts obtain good quality as uniform thickness,small pore defects and fiber defection.A Teflon cloth protective layer on the surface of the layup can effectively improve the deflection and deformation of the fiber in the 45° direction of the surface layer.