Hydroponic seedling raising device

The hydroponic seedling raising device comprises a box body, fixing plates are fixedly connected to the left side and the right side of an inner cavity of the box body, a filtering plate is placed on the surface of the top of each fixing plate, and positioning inserting rods are arranged at the four corners of the surface of the top of each filtering plate; the top of the positioning inserting rod penetrates through the filtering plate and extends into the fixing plate, a liquid discharging pipe is fixedly connected to the bottom of the right side of the box body, and the surface of the liquid discharging pipe is sleeved with a valve. The pull rings, the clamping plates, the supporting plates, the inserting plates, the pull blocks, the reset springs, the connecting columns and the inserting grooves are used in cooperation, the frame body stabilizing function is achieved, and the problems that an existing water culture seedling frame body is generally directly placed on the top of a nutrient solution box and l