With young tapping aged rubber tree (Hevea brasiliensis) CATAS7–33–97 as test material, two types hormone of ethrel and jasmonic acid(JA) and tapping times were designed to study rubber yield and its constitution factors . The results indicated that its suitable period to increase yield appeared at the 2nd tapping when CATAS7–33–97 was tapped with 0.5% ethrel stimulation in the 3rd tapping year, dry rubber yield per tree reached to 72.59 g, the net increase rate of rubber latex was up to 17.88%, and the net increase rate of dry rubber content reached 3.28%. The latex productions from the 0.3% JA-stimulated rubber tree all decreased during every tapping. Only dry rubber content of the 2nd-5th tapping times increased. The higher yield of dry rubber was not achieved in this condition. It was suggested that the latex yield was the main factor affecting the dry rubber yield of CATAS7–33–97 tapped with the two hormone stimulations, whereas the dry rubber content had relatively smaller effect on it.