In order to solve the problem of low precision of the reflector profile,the optimal splicing process was obtained by theoretical analysis of the honeycomb splicing process of the reflector,and the process was tested and verified.The results show that the number of hexagonal honeycomb core splicing is generally 3 or 6 times,which is beneficial to symmetrical honeycomb structure,lattice regularly and reduction of the uneven distribution of in-plane stiffness,and improvement of the surface accuracy of reflector.J-310A film can be used as the first choice for the honeycomb splicing adhesive of high-precision reflector because of its convenient construction,the thin thickness after curing,which can greatly reduces the effects of expansion mismatch and sudden change of stiffness of different materials and be beneficial to improve the accuracy of the reflector profile.The pre-pressurization of the fixed clamp and the co-curing with the reflector can be used as the current optimal splicing process.The method is simple and low-cost.The 1.8 m diameter reflector prepared by the improved honeycomb splicing process has a profile accuracy of RMS=53 μm,which is 25 μm higher than the traditional process and meets the design requirements.The experimental results show that the reasonable splicing method of honeycomb can effectively avoid the influence of foam rubber and honeycomb expansion mismatch,reduce the influence of the agglomerate adhesive and honeycomb stiffness abrupt change,improve the symmetry of honeycomb structure and the accuracy of reflector profile greatly.The use of this process to splicing honeycombs can also effectively reduce the amount of glue used and reduce the structural quality of the product.