The results show that growth volumes of the mouse tumors following carbon radiation are distinctly less than control during 21 days; the more fractions of radiation with same doses, the slower growth of tumors and the higher inhibition of tumors; different doses with the same fractions of radiation .

METHODS In vitro and in vivo study on the pharmacological activity of numberⅠ from Euphorbia Lathyris L was performed by using MTT method and mice transplant tumor model respectively, in vivo mice neoplasia weight,anti rate,thymus exponent, spleen exponent and leukocyte number were applied to detect the inhibition of S 180 and EAC in mice.