Garbage crushing and grading treatment device

The utility model belongs to the technical field of garbage crushing, and particularly relates to a garbage crushing and grading treatment device which comprises a working table, a blanking crushing mechanism is arranged on one side above the working table, and a grading crushing mechanism is arranged on one side of the blanking crushing mechanism. By arranging the discharging crushing mechanism and the grading crushing mechanism, garbage is effectively subjected to grading treatment, an arranged power motor drives a crushing cutter and an unpowered crushing roller to rotate at the same time to preliminarily crush the garbage, and an arranged first motor drives a crushing auger to rotate to secondarily crush the garbage; and meanwhile, atomization and dust falling are carried out on dust during crushing through the arranged atomization and dust falling assembly, the crushed garbage is crushed again through the arranged conveying assembly by means of the clamping and crushing assembly, the content of air smoke