The invention discloses a plastic garbage recycling device based on a high-mountain dangerous slope and an application method thereof. The lower end of a retractable rope is connected with a recyclingbox; the recycling box is internally provided with an exhaust fan for sucking garbage; the recycling box is connected with a fixing hook which is fixed on the mountain slope and a recycling bag for storing garbage; the recycling bag is internally provided with an interlayer; filling gas is filled between the recycling bag and the interlayer; a plurality of through holes are formed between the interlayer and the recycling bag; the exhaust fan for exhausting gas is connected between the recycling box and the recycling bag; the shrinkage and expansion of the recycling bag are controlled throughthe exhaust fan; the recycling bag on the recycling box is internally connected with an extruding machine for extruding the garbage; the extruding machine is used for extruding the garbage entering the recycling bag from the recycling box. The device disclosed by the invention can be used for rapidly cleaning the garbage and a utilization process is more efficient and safer.