Disclosed in the present invention are an organosilicon-modified acrylate, a silane-modified polyether adhesive, and a preparation method therefor. The organosilicon-modified acrylate has a structure as shown in formula I. The silane-modified polyether adhesive is prepared from raw materials comprising the following components, in parts by weight: 100 parts of an organosilicon-modified acrylate, 10-30 parts of a silane-modified polyether resin, 1-10 parts of a plasticizer, 1-5 parts of fumed silica, 1-5 parts of a diluent, 1-4 parts of a photoinitiator and 0.5-3 parts of a catalyst. The silane-modified polyether adhesive can be rapidly cured and shaped, a shaded area can be completely cured by means of moisture, and the silane-modified polyether adhesive also has outstanding resistance to high and low temperatures, excellent flexibility, good mechanical properties, high mechanical strength, and a high elongation at break.