Circulating co-free sales system

The invention relates to a circulating co-free sales system, which comprises an order placing and payment module, a transaction confirmation module, a to-be-rewarded order generation module and a reward returning module, and is characterized in that the returning process of the circulating co-free sales system comprises the following steps: step (1), order placing and payment; step (2), transaction confirmation; step (3), generating an effective order to be rewarded; according to the circulation co-free sales system provided by the invention, the same product, the same category or the same merchant is not required for the purchase order of the effective order sharing, a single product or multiple products can be purchased together, and the effective order sharing order can be obtained as long as the payment amount of the single order is greater than 90% of the amount of the order to be shared. The purchased product of the effective bill sharing can be a physical product, a virtual product, and can be cancelle