The coordinated development of science popularization in the Beijing-Tianjin-Hebei region is a realistic choice for establishing a long-term cooperation and sharing in the Beijing-Tianjin-Hebei region，and a platform for science popularization with multi-level and wide-ranging features. The construction of a coordinated development mechanism is an important part of the coordinated development of science popularization in the Beijing-Tianjin-Hebei region. First，analyze the current situation of the construction of the Beijing-Tianjin-Hebei science popularization collaborative development mechanism，analyze its existing problems and shortcomings，use the principles of institutional economics to put forward principles and ideas for the construction of an efficient and coordinated development mechanism，and finally propose the construction path and the construction path of the Beijing-Tianjin-Hebei science popularization and collaborative development mechanism Corresponding countermeasure suggestions.