Motived to find the optimal subsidy strategies in the used apparel recycling supply chains}, we established a benchmark recycling model including a brand retailer and a remanufacturer, and we extended the benchmark model based on different subsidy scenarios: (a) the government subsidizes the remanufacturer, (b) the government subsidizes the retailer's remanufacturing part, (c) the government subsidizes all recycled apparel from the retailer. The constructed models showed some interesting results. (1) Both the strategies (a) \& (b) drove the same recycling efforts. The remanufacturer maybe mistakenly believe its profits could increase with the lower procurement price in scenario (b). However, the profits were the same in both scenarios. (2) The strong consumer sensitivity to recycling efforts not only increased the retailer's profits but also dropped the remanufacturer's profits. Therefore, the strong consumer sensitivity is not good for all players. (3) The donation ratio should be within a reasonable range. Otherwise, the remanufacturer's profit decreases, and even the remanufacturer withdraws from the supply chain. (4) The optimal subsidy strategy for the supply chain members is that the government subsidizes all recycled from the retailer. Based on our findings, some management insights and suggestions are presented.