We once tried to treat sheep and goats suffering from theileriosis caused byTheileria hirci using Berenil, Primaquine phosphate, etc. but the cure rate never exceeded 88%. Afterwards we used ‘Miejiaoming’ produced by ourselves and the curative effect was improved significantly. Altogether 33 diseased sheep with ages ranging from 1·5–4 months and with infected red blood corpuscle rates of over 5% were treated in 2 groups. The first group, of 18 sheep, was treated with a dosage of 0·1 millilitre per kilogram body weight and the second group, of 15 sheep, with a dosage of 0·15 millilitre per kilogram body weight. Every diseased sheep was given a daily injection of “Miejiaoming” for 2–4 days. One sheep in the first group was treated four times. Its temperature was reduced from 41·1°C to 40·0°C and its infected red blood corpuscle rate from 36·7% to 2·1%, but it suffered from severe anaemia and heart failure and died on the sixth day. All other sheep in the two groups were cured: the cure rate for the first group was 94·4% and for the second group 100%. In addition, the medicine has been used in regions such as Shanxi Province for treatingTheileria annulata, T. sergenti andBabesia bovis of cattle with satisfactory results.