The invention discloses a cement concrete internal-doping type water-based enhancer which is a bifunctional silane emulsion. The bifunctional silane emulsion comprises 1-65% of silane, 0.2-5% of emulsifier, 0-2% of defoaming agent and the balance of water. The cement concrete internal-doping type water-based enhancer has the advantages that the feature that the silane and cement hydration products can form new silicon-oxygen bonds is utilized, enhancing is performed from the angle of cement hydration product C-S-H gel polymerization degree, and the toughness of organic molecules are utilized to increase the mechanical performance of concrete.