A new type of anticorrosive coating for concrete， glycerite（TA）/SiO₂ hydrophobic coating was developed successfully based on the mussel bionic principle. Twenty-two sets of process combinations were set up to obtain the optimal preparation process for the coating in terms of the water contact angle， electric flux value and surface microstructure. The effect of the coating from the optimal preparation process on the anti-ionic penetration performance of concrete was investigated by natural diffusion test， and the stability of the coating was investigated by abrasion and acid-alkali corrosion test. The results show that the TA/SiO₂ hydrophobic coating surface has rich micro and nano structures， with a water contact angle 148.1°， which can improve the ion penetration of concrete by at least 75.31%， and has excellent stability.