Abstract: Large multi span glass greenhouses often use smooth tube radiators as heating materials．Generally, different surface treatment methods such as plastic spraying, painting and hanging plating are often used for heating pipes．In order to reduce energy consumption and ensure heat utilization, influence of different surface treatment methods on heat dissipation of heating pipes were studied．Results showed that among three surface treatment methods, heat dissipation of plastic spraying and painting heating pipeline was larger, and metal thermal strength of plastic spraying pipeline was the largest．The research results could provide theoretical basis and empirical data for practical application of heating pipe radiator in greenhouse．