This paper mainly relates to the supplementary function of sharing economy in relation to regional economic integration. Advances in information technology, new normal in wealth distribution and going beyond traditional rules and regulations enabled the creation of the sharing economy. To a certain extent, the sharing economy can be regarded as having similar integration effects as traditional FTAs. At the same time, contrary to the top-down approach (nation as main actor) in a regionalism framework, the sharing economy is a bottom-up framework (individuals/consumers as main actor). This could make an impact on main business models, while speed up the bottom-up regionalization process. The sharing economy is one kind of regional economic integration model that connects individuals and groups, community trust and internet technology and utilizes all types of production factors. However, issues facing the sharing economy include regulatory challenges, work structures and business transaction models.