The curing dynamic of benzoxazine resins was catalyzed by the incorporation of carbon nanotubes. The catalytic effects of different mass fraction carbon nanotube on benzoxazine thermoset resins were researched by dynamic DSC analysis and isothermal DSC analysis. Experiment results prove that excessive amount of the nanotubes leads to an increase in activation energy and pre-exponential factor, which means that the reaction is hindered. The 2% incorporation of the carbon nanotubes has the best catalytic effect on curing behaviors of benzoxazine resins. The activation energy decreases from 275.83 kJ/mol to 51.97 kJ/mol by 2% incorporation of carbon nanotubes.