The product is a detachable first aid stretcher, which is mainly used for ambulance to transport fractures and paralytic patients. The middle part of the stretcher is provided with a hinge chain type clutch device, which enables the stretcher to be separated into two parts. Without moving the patient, the patient can be placed in the stretcher or on the operating table or bed quickly, and the stretcher can be drawn under the patient's body. The length of the stretcher can be adjusted according to the patient's body. After carrying the patient, the stretcher can be directly transferred to the ambulance stretcher. After the stretcher is separated into two parts, it can be folded to facilitate transportation and carrying.