Disease and pest sampling device and method for forestry disease and pest control

The invention discloses a disease and pest sampling device and method for forestry disease and pest control, the device comprises a fixing ring assembly, a skeleton assembly and an insect catching mesh bag, the insect catching mesh bag is detachably connected with the skeleton assembly, the fixing ring assembly is used for being installed on a tree, and the fixing ring assembly is detachably connected with the skeleton assembly; the framework assembly comprises a shell, a plurality of hollow round rods, a mounting plate, a left shell and a right shell, the insect catching net bag is detachably connected with the shell, and the shell is connected with the fixing ring assembly; the shell is fixedly connected and communicated with the left shell and the right shell through the plurality of hollow round rods; the mounting plate is fixedly connected with the right shell and the left shell through the plurality of hollow round rods; a sliding table cylinder is detachably arranged in the shell; the invention aims to