The viscosity and curing characteristics of bisphenol-E cyanate ester resin were studied through experiments to reveal the influence of catalyst on the curing mechanism of the cyanate ester resin. Quartz fiber/bisphenol-E cyanate ester composites were fabricated by RTM (Resin Transfer Molding) and VIMP (Vacuum Infusion Molding Process) processes to investigate its mechanical properties. Results show that the viscosity of the resin system is less than 300 mPa?s and its gel time is more than 10 h from room temperature to 90 ℃. The temperatures of initial curing, curing and final curing of the resin system are 186±5 ℃, 235±5 ℃ and 286±5 ℃ respectively. And the curing characteristic temperature decreases with the increasing content of the catalyst until the catalyst saturates with the range from 0.02% to 0.03%, which can cause the curing temperature of the resin system decreased by nearly 60 ℃. Therefore, it is very important to avoid implosion and to fabricate the quartz fiber/cyanate ester composites by liquid composite molding successfully. The mechanical properties of VIMP manufactured sample is obviously higher than that of RTM fabricated sample.