Abstract: The naturel red radish pigment is a kind of atbocyanio compound and it is not stable. Red radish (Raphnus sativus cv ) was used as material in this study. The auther studied the effects of five kinds of stabilizers on the stability of red radish pigment which was extracted from the fresh red radish roots and the optimal stabilizer and dosage were obtained. The results showed that 0.03% Vitamin-C, 0.03% Glu and 0.03% Citric acid can obviously delay the change of color, and the stability effect of association of Vitamin-C and Citric acid to the pigment is the best; Further studies showed that the best consumption of Vitamin-C and Citric acid is 0.04% and 0.08% respectively.