Objective To examine the prevalence of tuberculosis （TB） among freshmen

so as to provide the scientific basis for tuberculosis prevention. Method PPD Test was conducted among 7 282 freshmen between 2003 and 2006 in hechi college. The positive chest X-ray films

sputum smears were done for the students of fluoroscopy abnormal. Results Of all tested students

the positive ones accounted for 17.06 % with the strong positive rate of 3.89 %

and 1.24 % had a history of TB. The rate of the positive and the history of TB in the countryside（18.51 %） is higher than the city（14.31 %）

and male（18.95 %） is higher than female（15.73 %）. Conclusion The PPD test is a helpful method to diagnose TB cast of freshmen. Different preventive measures are taken according to different results of PPD tests.