In this paper, the synthesis equipments of ZnGeP₂ polycrystal were studied, including the ampoule,two zone synthesis furnace and its temperature field curve. With the help of these, the synthesis experiments have been done by the two zone vapor transporting method. The synthetic polycrystalline materials have been characterized by various methods, including XRD, EDS and density test. These results indicated that the starting materials is high-pure and single-phase polycrystal of ZnGeP₂. So the synthesis equipment and method designed by us were suitable for the ZnGeP₂ polycrystal synthesis, which have also established the fundament for obtaining high-quality ZnGeP₂ polycrystal materials.