The invention discloses a waste classification and environment-friendly treatment system. The waste classification and environment-friendly treatment system comprises a smashing machine, a sorting machine, a filtering screen, a dryer and a conveying belt, wherein the smashing machine, the sorting machine, the filtering screen and the dryer are all connected through conveying belts. The smashing machine comprises a smashing box, a feeding channel, a baffle, rotary knobs, sliding grooves, sliding blocks, a first smashing roller, limiting plates, bolts, a second smashing roller, a cover plate anddriving motors. The feeding channel is fixedly connected to the top end of the smashing box, and the baffle is connected to the edge side position of the inner wall of the feeding channel in a rotating mode. The waste classification and environment-friendly treatment system is scientific and reasonable in structure and safe and convenient to use; the first smashing roller and the second smashingroller are driven to rotate through driving motors in the smashing box to smash waste; and meanwhile, the cover plate is opened, the sliding blocks slide to pull the limiting plates to move, and thusthe first smashing roller is driven to slide out of the smashing box, so that the waste between the first smashing roller and the second smashing roller can be conveniently cleaned, and accumulation of the waste can be avoided.