The invention relates to the technical field of artificial intelligence pest control, and discloses an intelligent pest control device suitable for different saplings. The intelligent pest control device comprises a trunk, wherein a shell is movably connected to the outer side of the trunk, an adjusting mechanism is movably mounted in the shell, an inducing mechanism is movably mounted in the shell, and the adjusting mechanism comprises a rotating wheel, a first connecting shaft, a first piston and a first connecting rod. According to the intelligent pest control device suitable for different saplings, a clamping block is slidably connected to the interior of a first shell, so that wind energy can be effectively utilized, effective fixation can be achieved through a clamping piece, meanwhile, the situation that trees are damaged by using iron wires and the like is avoided, automatic spraying can be conducted in the pest high-incidence period, the auxiliary effect on pest control is achieved, the equipment practicability is improved, the detection efficiency is improved, diseases can be timely and accurately found and treated, and in the treatment process, the concentration of pesticide liquid is automatically adjusted and the pesticide liquid is automatically sprayed to insect damage points.