Medical pneumothorax needle

The invention discloses a medical pneumothorax needle. The medical pneumothorax needle comprises a containing cavity, wherein the top of the containing cavity is provided with an opening, the bottom of the containing cavity is provided with a through hole, the lower portion of the containing cavity is provided with a piercing tube, the lower end of the piercing tube is provided with the sharp end, a detachable buckle ring is tightly installed between the containing cavity and the piercing tube, an airflow one-way valve is arranged in the containing cavity, the bottom of the one-way valve is downwards provided with a hollow exhaust tube in a communicated mode, the exhaust tube downwards penetrates through the through hole and is coaxially arranged inside the buckle ring and the piercing tube, the lower end of the exhaust tube does not exceed the sharp end of the piercing tube, and the distance between the exhaust tube and the bottom of the sharp end is smaller than the height of the buckle ring. The medical pneumothorax needle solves the technical problem that pneumothorax emergency instruments which are convenient to carry and suitable for being used in emergency do not exist.