The invention discloses a 
retarder combining Chinese medicines and western medicines and used for preventing and curing the rabbit 
coccidiosis and a preparation method thereof, pertaining to the technical field of prevention and cure with the 
drug of poultry and 
livestock parasite. The 
retarder comprises ingredients with portions by weight: 2 to 5 portions of antifeverile 
dichroa root, 3 to 6 portions of abrotanum, 2 to 5 portions of 
sophora flavescens, 1 to 3 portions of pulsatilla chinensis, 1 to 3 portions of 
radix bupleuri, 1 to 3 portions of rhizoma imperatae, 1 to 3 portions of liquoric root, 0.01 to 0.05 portions of 
diclazuril, 8 to 10 portions of 
porous starch and 0.001 to 0.003 portions of 
chitosan. The ingredients are prepared by the steps of soaking in 
ethanol and Soxhlet extraction, followed by soaking in water and Soxhlet extraction, mixing, absorption and combination of extract and 
diclazuril as well as 
porous starch and 
chitosan, and regulation of medicinal 
powder quality, etc. The results from the experiments show that the egg 
reduction rate for the rabbit 
coccidiosis is 99.2 percent; in addition, the 
retarder of the invention is mainly applied to the prevention and cure of the rabbit 
coccidiosis.