The invention discloses an insecticide mist spraying device for a road green belt of municipal engineering. The device comprises a supporting base, an insecticide box is connected to the right side ofthe upper end of the supporting base, a guiding groove is formed in the left side of the upper end of the supporting base, a slide block is installed inside the guiding groove, a first lead screw isconnected to the middle of the slide block, a fixed block is connected to the right end of the first lead screw, a lifting rod set is connected to the upper ends of the fixed block and the slide block, a hinging block is connected to the right side of the upper end of the lifting rod set, a lifting panel is connected to the upper end of the hinging block, a piston cylinder is fixedly arranged at the right side of the upper end of the lifting panel, a piston is arranged inside the piston cylinder, a second lead screw is connected to the left end of the piston, a second motor is connected to theleft end of the second lead screw, a mounting plate is connected to the left end of the second motor, and a straight rack is connected to the middle of the left end of the mounting plate. According to the insecticide mist spraying device for the road green belt of municipal engineering, insecticide liquid in the insecticide box is extracted, and through the effect of an insecticide spraying rod,insecticide mist is sprayed to the road green belt; meanwhile, the height of the lifting panel can also be adjusted, and the requirement for spraying the insecticide to a high road green belt is met.