For the inventory control problems of cross-border e-commerce products based on Overseas Warehouse Mode. This paper develops the newsvendor model with false failure returns, to gain the lowest expected cost, then analyzes the influence of return rates and unit return cost on optimal ordering quantities, The results show that the optimal ordering quantity decreases with the increase of return rates, but increases with the decreases of unit return cost. Finally, to encircle the return rates and unit return cost, the article advises on optimizing inventory by innovating Dual-channel sales mode of cross-border e-commerce products, implementing pre-sale strategy of cross-border e-commerce products, strengthening the construction of big data and investigation of Overseas Warehouse, building the Overseas Warehouse through multilateral cooperation.