NOVELTY - Constructing garbage land filled pumping well, by digging collecting pipe having larger vertical hole than the hole of garbage pile on set positions using drilling drill, digging the lower end of the air inlet hole, locating digging in the vertical hole, mounting supports seal plate at the bottom of the backfill pit, making the upper end of the gas pipe through the lateral sealing ring, and filling soil or garbage in backfill pit.    USE - The method is useful for constructing garbage land filled pumping well.    ADVANTAGE - The method is simple, and cost-effective, and can be performed repeatedly.    DETAILED DESCRIPTION - Method of constructing garbage land filled pumping well, involves (a) digging collecting pipe having larger vertical hole than the hole of garbage pile on set positions using drilling drill, and digging one or more peripheral backfill pit of the vertical channel of the upper end of the vertical hole, (b) digging the lower end of the air inlet hole, the upper end of the gas pipe of solid wall in the vertical hole provided with multiple group locator on the gas collecting tube such that the gas collecting pipe does not contact with the hole wall of the vertical hole, digging gas collecting pipe vertically, and locating digging in the vertical hole, (c) mounting supports seal plate at the bottom of the backfill pit, and connecting the lower part of the sealing plate with a vertical opening of the lateral sealing ring to the vertical channel isolated from outside air, making the upper end of the gas pipe through the lateral sealing ring, bearing sealing plate pile on the upper surface, and controlling the gas through air inlet flower hole which is not supporting sealing plate, and (d) filling soil or garbage in backfill pit. An INDEPENDENT CLAIM is included for garbage landfill gas collecting device, which comprises a gas collecting pipe (1), a central locating device (2), sealing plate (3) and a lateral sealing ring (4), where the gas collecting tube is on drill by the digging machine directly landfill vertical channel (5), the central locator is installed on the gas collecting pipe, and the central locating device of the outer ring with the vertical hole is contacted with the gas collecting pipe and is located in the vertical hole, the supporting sealing plate (3) is set with vertical opening at the bottom of the side of the sealing ring (4), the backfilling pit upper end (6) is connected to the socket sealing plate and inserted into vertical channel, the upper end of the side of the sealing ring has outer diameter of the vertical channel, the vertical channel through the bearing sealing plate and a lateral sealing ring, the upper end of the outer air is isolated with the air collecting tube through the lateral sealing ring and a bearing sealing plate after passing out from backfill pit (6) located on the bearing seal of the gas collecting pipe (1) on the pipe wall distributed with multiple holes for landfill.    DESCRIPTION OF DRAWING(S) - The drawing shows perspective view of the garbage landfill gas collecting device.    Gas collecting pipe (1)    Central locating device (2)    Sealing plate (3)    Sealing ring (4)    Landfill vertical channel (5)    Backfill pit (6)