Abstract: During the structure development phase of radar,designers or simulation engineers often have to do much simulation work,according to different requirements,such as stress simulation,thermal design,flow field simulation,modal analysis,vibration characteristics,fatigue life prediction,etc.A collaborative simulation environment is proposed to manage the existing simulation softwares,data,flow chart and personnel.The connotations and detailed requirements on functions of the environment are described.According to the simulation technology capabilities at present,the basic functions of collaborative simulation environment to be built are indicated.A feasible implementation concept and a collaborative simulation process of a typical product are suggested.Finally,a method to manage simulation model maturity by the collaborative environment is given.