The utility model discloses a stiff aphid seedling field release protection device of aphidiidae, the planting basin height of built -in soil is 8~12 centimetres, plants the basin top and sets up the visor, and the interval is 13~17 centimetres between planting basin and the visor, it sets up 13~17 centimetres of high stabilizer blades to plant basin four corners lower extreme. Plant stiff aphid seed in planting the basin, the normal growth of stiff aphid seedling is guaranteed to proper amount soil, and avoid rainwater and high temperature that the visor can be fine insolate to stiff aphid seedling and the produced adverse effect of stiff aphid, and provide suitable illumination, its structural style and the high setting in space simultaneously suits with aphidiidae's parasitic habit, and the cigarette aphid is parasitic provides convenience for the aphidiidae departure device behind the feathering begins to look for from the lower part of crop, can not lead to because providing the protection causing any obstacle to its parasitic process.