Circular economy aims to maintain the product value as long as possible. Researches indicate that CE implementation is difficult due to different barriers. In this study, we prioritize CE implementation barriers in order to identify which barriers to deal with first. To achieve this objective, barriers weights are calculated through the Best Worst Method. A systematic literature review is conducted to identify CE challenges. Then, experts from different industrial sectors were called to prioritize these barriers based on their experience. The Best Worst Method Excel solver was used to calculate local and global weight of each challenge. The findings of this study suggest that economic issues are the most significant barriers to CE implementation followed by supply chain management issues, technological, cultural and finally governmental issues. This study aims to help decisions makers from different sectors to prepare their transition to circular flow by defeating main barriers. However, due to the limited considered number of barriers and experts, future research can be extended to more barriers and more experts.