Abstract: Toxicities of nine acaricides to adult females and eggs of Tetranychus cinnabarinus were evaluated in laboratory using slide-dip method and leaf dip method recommende FAO respectively. The results indicated that avermectin was the highest toxicities to adults and the LC50 was 0.058 mg?L-1.The LC50 was 5.72 mg?L-1 of chlorfenapyr with higher toxities to adults. The LC50 of flufenoxuron, hexythiazox, pyridaben and azocyclotin were 12.43-67.01 mg?L-1, showed good toxicities to adults. The propargite showed the normal toxicities to adults, however, the fenpropathrin and omethoate showed the worst toxicities to adults. The results also showed that the toxicies to eggs from high to low in turn were as following: avermectin, hexythiazox, pyridaben, chlorfenapyr, azocyclotin, flufenoxuron, fenpropathrin, propargite and omethoate. The difference of toxicities between eggs and adults were also studied and the results showed that, the hexythiazox and pyridaben showed the highest difference with 150.27- and 134.28-folds respectively, secondly for azocyclotin with 69.80-folds, other acricides had the relatively small difference with 1.44- to 15.89-folds.