To explore prepreg curing process which adjust to advanced pultrusion technology, curing exothermic
process of carbon fiber/ epoxy prepreg was studied in this work with differential scanning calorimetry ( DSC) to improve the typical curing process of prepreg USN12500. Then the process schemes were designed and conducted with pressure values and the time to apply pressures as variables. Based on the available equipments in the laboratory, the curing process of prepreg adopt with advanced pultrusion was simulated and samples were prepared. With void content as investigation index we optimized the curing process parameters of advanced pultrusion. The results of the test indicate that final process scheme was optimized with pretreating the prepreg at 110 for 20 min, then curing at 130 for 15 min under pressure of 0. 4 MPa, and finally postcuring at 150 for 1. 5 h. The test verificated that void content less than 1. 1% in composites profiles can be prepared.