Trap lamp for preventing and treating tree diseases and pests

The trap lamp comprises a protective cylinder, the protective cylinder is of a top opening structure, a partition plate is fixedly installed on the lower portion of the inner side of the protective cylinder, a threaded rotating shaft is movably installed in the middle of the top of the partition plate, and a limiting block is arranged at the top end of the threaded rotating shaft. And an inner threaded sleeve is installed on the threaded rotating shaft in a threaded sleeving mode, a lifting plate is arranged on the outer side of the inner threaded sleeve, two connecting rods are fixedly installed at the top of the lifting plate, and an installation ring is fixedly installed at the top ends of the two connecting rods. The insect trap solves the problems that part of killed winged insects can adhere to the surface of a power grid, too many winged insects adhere to the power grid after a long time, light divergence of the trap lamp is affected, the insect killing efficiency is reduced, meanwhile, frequent manual