The utility model discloses an air exhausting structure, air exhausting structure includes at least one passageway of airing exhaust, the passageway of airing exhaust is an airtight space, airtight space only sets up the through -hole at its roof and/or its lateral wall, the through -hole sets up to at least two, and wherein at least one through -hole is as the air intake, and remaining through -hole is as the air outlet. Air exhausting structure bottom is solid, and the impurity that can effectively prevent to appear in the exhaust pipe of cooling back and pollutant are lower.