Gas isolation device for sickbed

A gas isolation device for a sickbed comprises a shell which is of a semi-closed structure formed by connecting three side plates and a top plate; the air supply pipe is fixedly arranged on a side plate at the opening of the shell and is connected with a positive pressure device; and the exhaust pipe is fixedly arranged on the side plate opposite to the air supply pipe and is connected with a negative pressure device. According to the hospital bed, a patient lies on the hospital bed, the head of the patient is located in the shell, the air supply pipe supplies air, the exhaust pipe sucks air, and flowing air forms an air curtain between the air supply pipe and the exhaust pipe to seal the opening of the shell, so that air exchange between the interior of the shell and the exterior of the shell is avoided; a patient is prevented from infecting infectious diseases of the respiratory system to a doctor, a semi-closed structure is adopted, the doctor can conveniently diagnose and treat the patient, the patient do