NOVELTY - A system for ventilating pile of compost and collecting waste gas and percolate, comprises an air distributing pipe (4) at the base of the pile and a basic stage (1); where at least one air distributing pipe is installed in basic stage at the base of each pile along length direction of pile; the air distributing pipe is set with ventilating holes (3); the basic stage above ventilating hole of air distributing pipe is set with a groove; the groove above ventilating hole is paved with a ventilate protectively layer; and the sealed end of air distributing pipe is set with a percolate outlet (18).    USE - The system is useful for ventilating pile of compost and collecting waste gas and percolate (claimed).    DETAILED DESCRIPTION - A system for ventilating pile of compost and collecting waste gas and percolate, comprises an air distributing pipe (4) at the base of the pile and a basic stage (1); where at least one air distributing pipe (4) is installed in the basic stage (1) at the base of each pile along length direction of the pile; the air distributing pipe is set with ventilating holes (3); the basic stage (1) above the ventilating hole of the air distributing pipe is set with a groove; the groove above the ventilating hole is paved with a ventilate protectively layer; one end of the air distributing pipe is connected with a main air distributing pipe of a fan (9) while the other end is blocked by a pipe plug (17); the sealed end of the air distributing pipe is downwardly set with a percolate outlet (18); the external peripheries of the pipe plug and the percolate outlet (18) are set with cleaning grooves (12); the cleaning groove (12) is set with a percolate buffering and discharging device; one side of the cleaning groove (12) is set with a percolate discharging hole (8); the percolate discharging hole (8) is connected with a waste water draining pipe; the upside of the pile (16) is set with an exhausting pipeline (13) in length direction; the base of the exhausting pipeline is set with an exhausting hole; and all the exhausting pipelines (13) are connected with a main exhausting pipeline (29).    DESCRIPTION OF DRAWING(S) - The drawing shows a sectional view of the system for ventilating pile of compost and collecting waste gas and percolate.    Basic stage (1)    Air distributing pipe (4)    Fan (9)    Exhausting pipeline (13)    Pile (16)