A kind of hothouse plants humidification joint structure improvement, including an ontology, an adjusting seat, a lid and a filtering element (cartridge), the adjusting seat one end is equipped with articulated section spherical in shape, first and second ball-and-socket worked in coordination with pivot part is equipped between the ontology, lid and the articulated section of adjusting seat, the adjusting seat can be freely rotated and be adjusted the angle, adjusting seat lock is set into what ontology by lid again, its characteristic is in what: the water inlet of the adjusting seat is equipped with a filtering element (cartridge), fine sand, the impurity in drainage are crossed by the filtering element (cartridge), prevent ejecting head obstructor.一種溫室植物加濕接頭之結構改良，包括一本體、一調整座、一蓋體及一濾心，該調整座一端設有呈球形的樞接部，該本體、蓋體與調整座的樞接部之間設有與樞結部互相配合的第一與第二球窩，讓該調整座可以自由轉動而調整角度，再由蓋體將調整座鎖設於本體，其特徵在於：該調整座的進水口處設有一濾心，由該濾心過濾水中的細砂、雜質，防止噴出頭阻塞者。
