The utility model provides a carry chemotherapeutics's non - vascular chamber of formula of expanding certainly way support, characterized by includes the formula of expanding certainly metal support (1), sets up both ends about middle section (5) from expand formula metal support (1) respectively including middle section (5), near -end (6) and distal end (7), near -end (6) and distal end (7), is equipped with silica gel tectorial membrane (2) on the formula of expanding the certainly metal support (1), and the silica gel tectorial membrane carries the curative drug. 1, medicine coating is epimembranal at the support, more even, and is better to the effect effect at pathological change position, 2, foreign matters such as no bobble or tubule can not lead to the fact the stimulation to the lumen, and no foreign body sensation reduces and becomes inflamed and the hyperplasia, 3, when respiratory track etc. Are acutely coughed, do not have great foreign matter admission pipe intracavity, 4, the support is recoverable support, works as the drug release and finishes basically, and the doctor thinks respond well, when necessary change support continues with the help of the chemotherapy adjunctie therapy, can change the support, perhaps the support need be retrieved to other condition, recoverable support.