The invention provides a novel weather-resistant amino-containing polysiloxane-acrylic ester oligomer for photocuring of LED (light emitting diodes). The polysiloxane-acrylic ester oligomer is prepared by the following steps of using amino-terminated polysiloxane in formula I as raw material, reacting with one or two types of single-function group acrylic ester or methacrylate, and then reacting with one or two types of double-function group acrylic ester or methacrylate, so as to obtain the oligomer shown in the attached figure. The polysiloxane-acrylic ester oligomer has the advantages that a large amount of tertiary amine structures and siloxane structures is contained, the anti-oxidizing and polymerization inhibition effects of a photocuring formula under an LED light source are greatly improved, and the surface dryness function of a coating is promoted; the compatibility is good, the preparation is easy, the cost is low, and the storage is easy.