The utility model relates to the field of molding presses, and provides a molding press for installing an airtight valve of a nasal irrigator, which comprises a supporting mechanism, a pressing rod and a molding mechanism, the supporting mechanism comprises an installing table, the molding mechanism comprises a transmission gear, a molding sliding rod and a molding head, and the transmission gear and the molding sliding rod are embedded in the installing table. The transmission gear is fixedly connected with the pressing rod, and the mold pressing sliding rod is embedded into the transmission gear. By designing the molding press with the airtight valve mounting structure, the problems that an existing nasal irrigator airtight valve is low in mounting efficiency and poor in mounting quality are solved, and the beneficial effects that the mounting efficiency is improved, the product airtightness is improved, the universality of the molding press is improved, and the operation experience and the mounting effect are optimized are achieved.