In order to explore a new method to improve the comprehensive performance of the machine tool bed,steel fiber reinforced resin concrete was used to replace cast iron bed.Based on “HORSFIELD closest packing theory” combining with “Bailey method” and drainage method,the material mass fraction of steel fiber resin concrete components was determined to optimize its comprehensive performance,and composite strength and damping performance parameters were tested.A new structure of the same steel fiber resin concrete bed was designed with the cast iron bed as the comparison prototype.The static and dynamic characteristics and lightweight properties of the two material beds were analyzed and calculated with the finite element analysis software,and the two analysis results were contrasted.The results show that compared with the cast iron bed,the mass of the steel fiber resin concrete bed is reduced by 17.78%,the maximum global deformation and the maximum equivalent stress are reduced by 23% and 76.83% respectively;the first six natural frequencies are increased,and the maximum vibration amplitude in the X , Y and Z directions are reduced by 85.96%,68.49% and 50.30%,respectively.The response surface optimization method was used to optimize the design of the steel fiber resin concrete bed.Compared with the preliminary design scheme,the static and dynamic characteristics of the bed are improved to varying degrees while ensuring the lightweight of the bed.