According to the actual case, the application of steam jet to the recovery of exhausted steam is discussed. Main factors to af fect the injection coefficient as well as the relation between injection coefficient and exergy efficiency are illustrated. It has been found that the ratio of compression is more notable than the pressure of jetting steam on injection coefficient. The total injection coefficient of multistage compression may be lower than that of single-stage compression. Even though there is a bigger ex ergy loss in quality, large amounts of energy can be recovered from exhausted steam. Besides, the pollution of noise and thermal from waste steam exhaustion can be avoided.