The low VOC silicone-modified waterborne alkyd resin are prepared by using 30% soy oleic acid,17% pentaerythritol,5% diethylene glycol,16%benzoic acid and 4%terephthalic acid as reaction raw materials,4%methyltriethoxysilane as a modified material,8%ethylene glycol monobutyl ether and 16%water as dilute solvents.The resin not only possesses the good gloss and workability of alkyd resin itself,but also has excellent weather resistance and chemical resistance of silicone resin.The VOC content of the prepared coating is extremely low,which meets the national environmental protection requirements and belongs to a new type of environmentally friendly coating.