A seedling attachment plate capable of improving the growth and survival of aquatic animal seedlings and an assembled attachment device thereof are disclosed. The seedling attachment plate has a plurality of openings. The assembled attachment device includes a plurality of attachment plates and a support rack utilized to serially connect the attachment plates. The support rack is configured with an angle adjustment structure capable of adjusting the attachment plate at an optimum angle, which is based on the need of on-site breeding management and the seedling growth requirement during the seedling breeding process.本發明係提供一種可改善水生動物幼苗成長及活存之育苗附著板及組合式附著設備。其中,該育苗附著板上具有複數開孔;該組合式附著設備包含附著板及串連附著板之支撐架,該支撐架具有角度調整構造,以使附著板可在幼苗培育過程中,依現場培育管理及幼苗成長需求,調整附著板呈最佳角度。10‧‧‧開孔50‧‧‧浪板