The invention relates to a weather-proofing anti-scratch ultraviolet cured hard coating composite which comprises polyurethane acrylate, acrylate, aliphatic polyurethane acrylate, viscous accelerant, functional assistant and photoinitiator, or acrylate elastomer, polyurethane acrylate, acrylate, aliphatic polyurethane acrylate, viscous accelerant, nanosized silica-4HBAGE, functional assistant and photoinitiator. An acrylate high-crosslinking system in a formula can provide high hardness for a coating and has good weather and ageing resistance, and a polyurethane system can provide abrasion resistance, flexibility and low temperature resistance as well as water resistance, saline resistance and solvent resistance for the coating. The viscous accelerant can improve the levelling property of the coating, and the nanosized silica and functional assistant can enhance the anti-scratch and easy-to-clean characteristics of the coating. The composite can be widely applied to the fields of plastic, films and metal cover finish, varnish on carpentry surfaces, optical glass and the like, and has protection, attractiveness and decoration effects.