The invention discloses a stretcher lock device which comprises two long rods, two short rods and at least two binding belts. The inner sides of the long rods are fixedly connected with cantilever plates. The two ends of the long rods are fixedly connected with straight heads. The end faces of the free ends of the straight heads are provided with square holes. The two ends of the short rods are fixedly connected with 90-degree elbows. The end faces of the free ends of the elbows are fixedly connected with square plugs in clearance fit with and inserted in the square holes. The binding belts are arranged between the two long rods. The two ends of the binding belts are bound on the front side and the rear side of the two long rods through buckles capable of adjusting the tightness degree andshaped like a Chinese character 'ri'. By means of the technical scheme, locking can be achieved only by inserting the two cantilever plates between a patient body and the ground or bed surface and inserting and connecting the two short rods, the long rods cannot rotate, there is no need to conduct screwing through threads and nipples, and convenience and rapidness are achieved.