Abstract: 31 blood samples from proven patients with chronic schistosomiasis, 35 from the late stage patients, and 37 from healthy persons were tested by both T lymphocyte esterase label test and lymphocyte transfoamion test (LTT). Both ANAE-label test positivity rate and lymphocyte transformation rate were significantly lower in the schistosomiasis patients than in the healthy persons. The results measured by both methods were closely related.It is preliminarily considered that the determination of blood ANAE activity may be taken as a reference index for the evaluation of cell immunity function of the patients with schistosomiasis.