Based on the power structure of supply chain members, this paper considers the influence of green innovation behavior on the price, demand, ecological benefit, economic benefit and social benefit of supply chain members in a dual-channel supply chain composed of single manufacturer and single retailer. The results show that the sales volume and manufacturer profit of direct sales channel are always the largest under MS mode, while retailer profit is the largest under RS mode. From the perspective of total system profit, power structure of MS channel is optimal.