Insect killing device for cotton plant protection

The invention discloses a deinsectization device for cotton plant protection, and relates to the technical field of agricultural planting. The device comprises physical deinsectization assemblies and chemical deinsectization assemblies, the multiple physical deinsectization assemblies are arranged on a cross beam in a sliding mode, and the positions of the physical deinsectization assemblies on the cross beam are freely adjusted based on the actual cotton plant spacing on site; the cross beam is supported by two stand columns, and a top plate is fixed across the tops of the two stand columns. The chemical deinsectization assembly is fixed at the top of the top plate; the physical deinsectization assembly comprises a middle deinsectization box, an upper deinsectization box, a lower deinsectization box and an adjusting mechanism; t-shaped plates are fixed to the two sides of the middle deinsectization box. According to the cotton deinsectization device, the deinsectization effect is greatly improved in the mode