The invention discloses a stock garbage in-situ resourceful treatment method and a stock garbage in-situ resourceful treatment system. The system comprises a garbage temporary storage area, a plate feeder, a first breaking device, a drum screen, an air separation device, a second breaking device, a first magnetic separation device, a tension and relaxation screen, an aerobic biological drying reactor, an organic fertilizer compressing and packing device, a second magnetic separation device, a liquid type drum screen, a dewatering device, a percolating liquid treatment system and a deodorization system; garbage in the garbage temporary storage area is transported to the plate feeder; the plate feeder is sequentially connected with the first breaking device and the drum screen; a first outlet of the drum screen is connected with the air separation device; a first outlet of the air separation device is connected with the second breaking device; a second outlet of the air separation deviceis sequentially connected with the second magnetic separation device, the liquid type drum screen and the dewatering device; an outlet of the dewatering device is connected with a first inlet of theaerobic biological drying reactor; a second outlet of the drum screen is connected with the first magnetic separation device and the tension and relaxation screen; an outlet of the tension and relaxation screen is connected with a second inlet of the aerobic biological drying reactor; an outlet of the aerobic biological drying reactor is connected with the organic fertilizer compressing and packing device; the aerobic biological drying reactor is further connected with the percolating liquid treatment system and the deodorization system; and the garbage temporary storage area is further connected with the percolating liquid treatment system. Production of secondary pollution can be completely prevented, and highly-resourceful utilization of the stock garbage can be achieved.