The invention discloses a production process of carbon fiber compound T-shaped steel and relates to the technical field of carbon fiber composites. The production process comprises the following steps of preparing materials including more than three bundles of carbon fiber yarn materials, unsaturated resin, a catalyst, a pigment and a stabilizer; melting: heating the unsaturated resin to 55-65 DEG C, softening for 25-35min, then adding the pigment, fully stirring and mixing, then raising the temperature to 75-85 DEG C, and keeping the temperature for 10-30min; soaking: raising the temperature of the unsaturated resin to 100-110 DEG C, adding the stabilizer firstly, then adding the catalyst, fully mixing respectively, arranging the end sides of the carbon fiber yarn materials into a T shape, conveying, soaking into the unsaturated resin, and slowly passing through the unsaturated resin; extruding: extruding the soaked carbon fiber yarn materials through a T-shaped steel profile extrusion mold to obtain a T-shaped steel profile, heating to 130-140 DEG C, and carrying out curing and hardening; and cooling: cooling the T-shaped steel profile to normal temperature. The production process is cheap in cost of a produced product, saves the energy, is environmental-friendly and is convenient in production control and high in quality of the product.