The invention discloses a filer purifying oxygen inhaling pipe, comprising air pipes (3 and 4); the air pipes (3 and 4) are respectively connected with an upper cover (1) and a lower cover (2); the upper cover (1) and the lower cover (2) are connected to form a purifying cavity; two partition plates (6) in the purifying cavity divides the purifying cavity into three layers; the upper-layer partition plate (6) is provided with activated carbon filer cloth (5); a micropore filter film (8) is arranged at the lower-layer partition plate (6). The filter purifying cavity is additionally arranged on the oxygen inhaling pipe and is divided into three layers, oxygen firstly enters the first buffer cavity, enters the second buffer cavity after impurities of the oxygen are filtered by the activated carbon filter cloth, and enters the third cavity body after being subjected to filter film degerming to be discharged, the impurities and germs in the oxygen can be effectively removed and a patient can inhale clean oxygen.