The invention discloses a silane polyether adhesive with good concrete adhesive performance. The silane polyether adhesive is mainly prepared from silane modified polyether, filler, a solvent, a reinforcing agent, a light stabilizer, an antioxidant, a water removal agent, a catalyst and a coupling agent. According to the invention, modified polysiloxane (fatty acid substance) with high surface energy is introduced to the silane polyether adhesive, so that the surface energy of the silane polyether adhesive is effectively improved, and adhesive performance to a concrete base material is improved. Meanwhile, the invention further discloses a preparation method of the silane polyether adhesive with good concrete adhesive performance, and the method is simple and is suitable for popularization.