Since the coordinated development of Beijing，Tianjin and Hebei has become a major national strategy，Tianjin has strengthened communication and consultation with Beijing and Hebei Province，focused on promoting the coordination of legislative work in Beijing，Tianjin and Hebei，established and improved the collaborative legislative system and mechanism，gave priority to the deployment of legislative projects related to the coordinated development of Beijing，Tianjin and Hebei，and organized special research on the legislative guidance and guarantee of the coordinated development of Beijing，Tianjin and Hebei，From the legislative level，ensure the implementation of major national strategies to promote the coordinated development of Beijing，Tianjin and Hebei，and achieve remarkable results in collaborative legislation. In the future，we will further innovate the system and mechanism of collaborative legislation，broaden the field of collaborative legislation and collaborative work，give play to the role of regional synergy as a pilot，constantly explore and improve the scope of collaborative legislation，and creatively work well in legislation and supervision.