Abstract: The blend resin with different proportions of benzoxazine/phenolic was  investigated on the kinetics of reaction，thermal degradation kinetics and ablative property. The resin composite was prepared by impregnating glass cloth. The high temperature and normal temperature mechanical properties，the thermal properties and the ablative properties of the composite were investigated. The results show that the blend resin composite has excellent mechanical properties at high temperature and normal temperature and its thermal properties meet the needs of ablative materials. This blend resin composite can be used as the ablative composite.