The invention provides a
cigarette smoke filter which comprises a shell; one end of the shell is provided with a cigarette holder, and the other end of the shell is detachably provided with an end cover; a baffle is fixed in the shell, a partition plate is fixed to the side, close to the end cover, of the baffle, and the partition plate divides the interior of the shell into a cigarette cavity andan air outlet
filter element cavity; the side, opposite to the cigarette cavity, of the end cover is sealed, and the side, opposite to the air outlet
filter element cavity, of the end cover is provided with an air outlet; the baffle is provided with an air
inlet valve and an air outlet valve which are opened or closed in a one-way mode; ventilation holes communicating with the cigarette cavity are formed in the two sides of the shell, and
smoke exhaust filter elements are arranged on the inner sides of the ventilation holes; and the air outlet
filter element cavity is internally provided withan air outlet filter element. The cigarette cavity and the air outlet filter element cavity are in one-way communication with the cigarette holder through the air
inlet valve and the air outlet valve, mainstream
smoke enters the air outlet filter element cavity and is discharged after being filtered through the air outlet filter element,
branch smoke is left in the cigarette cavity and is discharged from the ventilation holes after being filtered through the smoke exhaust filter element; and harmful substances in second-hand smoke can be effectively filtered, so that the body health of non-smokers is guaranteed.