Abstract:〖WTBZ〗For new employees，quickly familiarizing with assembly and overhaul processes is the necessary item of introduction training.In order to solve the problems of low efficiency and high error rate in assembly and overhaul for new employees，the assembly and overhaul system based on the augmented reality technology is proposed.First of all，the threedimensional modeling platform is used to build the virtual threedimensional model.Secondly，the augmented reality technology is used to overlay virtual objects into the real scene.Thirdly，the assembly and overhaul related guidance information is integrated into the assembly and overhaul system.Finally，the assembly and overhaul system is transplanted to the mobile terminal smart glasses.It can be known from the actual operation on site of new employees that the assembly and overhaul system provides new employees with comprehensive，accurate and realtime assembly and overhaul information，improves the efficiency of assembly and overhaul，reduces the rate of assembly and overhaul errors，and greatly shortens the assembly and overhaul time，which has certain practicality and promotion value.