International Silk Union (ISU) is an international and specialized non-profit social organization in which enterprises and related organizations from the silk producing and consuming countries participate voluntarily. The secretariat is located in Hangzhou, China. Since its foundation in October 2015, there have been more than 140 enterprises and organizations from 27 countries and regions joining ISU, including China, Italy, France, Switzerland, Brazil, Poland, Japan, Turkiye, Thailand, India, Vietnam, Cambodia, Myanmar, Indonesia, Singapore, the United States, Australia, Uzbekistan, Bangladesh, Laos, Iran, Pakistan, Romania, Spain, the Philippines, Uganda and Hong Kong(China), among which there are 46 executive member units and 11 vice chairman units. Especially China Textile Engineering Society, Ufficio Italiano Seta, INTERSOIE France, Brazilian Silk Association, Vietnam Sericulture Association, Cambodia Silk Sector Promotion and Development Commission, and Iran Silk Research Center have joined as countries or regions, and their influence radiates to the world's major silk enterprises and research institutions. In 2020, ISU was included in the “Yearbook of International Organizations”, Union of International Associations(UIA), becoming the first silk international organization in the UIA with the secretariat being located in China. In 2021, ISU signed a strategic cooperation agreement to establish a dialogue partnership with International Sericulture Commission (ISC), an intergovernmental international organization.

Adhering to the purpose of “Communication & Cooperation, Development with Concerted Efforts”, ISU actively docks international exchanges and cooperation, holds international conferences, organizes international inspections, and establishes the professional committees in silk field including History Culture, Education Research, Technical Innovation, Fashion Design, etc. In order to smooth information exchanges, ISU establishes the official website of “World Silk Website” and Self-Media Matrix, hosts the proceeding of ISU News, co-hosts the professional journal of Journal of Silk, which integrates the journals, official bilingual websites, WeChat, Toutiao, Sohu, Baijia and Tencent, etc., promoting the international integration and development of silk culture and industry. The chairman of ISU is Zhang Guoqiang, chairman of the board of Cathaya group. The secretary-general of ISU is Li Qizheng, director of Hangzhou Oriental Silk Culture and Brand Research Center, and president of Periodicals Agency of Zhejiang Sci-Tech University.