Temperature field is an important process index of multi-material cocuring of composite material case.Thermocouples were pre-implanted in order to acquire temperature data during the two different curing cycles,named 1 ^# curing cycle and 2 ^# curing cycle.The curing degrees and properties for F-3/EP-04 winding layers and ethylene-propylene-diene monomer(EPDM) insulation were investigated under the cocuring conditions.The results showed that the internal temperature existed obvious hysteresis phenomena,and the curves of temperature-curing time displayed parabola shape approximately.Under the 1 ^# curing cycle condition,the winding layers could be cured completely,but EPDM insulation could not.By contrast,the winding layers and the EPDM insulation could be cured completely with no mechanical decrease under the 2 ^# curing cycle condition because of the highest curing temperature increase and the holding time extension.Temperature gradient was very small for EPDM insulation,but big in the composite winding layers,which could be lowered through enhancing cocuring temperature and holding cocuring times.