The invention discloses an energy-saving and environmental-protection garbage crushing apparatus, which comprises a box, a crushing channel, a material guide plate and a base, wherein the left side ofthe top portion of the box is provided with a material inlet, the crushing channel is arranged below the material inlet inside the box, a rotation shaft is arranged in the crushing channel, a spiralcutter blade is fixed on the periphery of the rotation shaft, the crushing channel is a mechanism with the large upper portion and the small lower portion, the material guide plate is obliquely arranged below the crushing channel, and an electromagnetic plate is fixed on the top portion of the material guide plate. According to the present invention, by matching the material guide plate and the electromagnetic plate, the metal in the garbage can be recovered after the garbage is crushed, such that the waste of metal resources can be avoided, and energy saving and environmental protection can be achieved; and by arranging the crushing channel with the large upper portion and the small lower portion, the garbage is gradually compacted during the downward movement, such that the garbage completely contacts the spiral cutter blade so as to improve the crushing effect.