The invention relates to a method for preparing Chinese medicinal compound effervescent tablets for treating endometritis of cows. The method is characterized by comprising the following steps of: taking the following medicinal materials in parts by weight: 2 to 4 parts of coptis, 1 part of phellodendron, 1 part of Baikal skullcap root, 1 to 2 parts of kuh-seng, 1 part of honeysuckle, 1 part of forsythia, 1 to 2 parts of motherwort, 1 to 2 parts of safflower, 1 part of peach kernel, 1 to 2 parts of Chinese angelica and 1 part of medlar; and respectively extracting active ingredients from all medicinal materials, mixing the extracts, adding a filling auxiliary material to form dry Chinese medicinal extract powder, mixing and tabletting with other auxiliary materials of the effervescent tablets, and thus obtaining the Chinese medicinal compound effervescent tablets. The method has the advantages that the Chinese medicinal compound effervescent tablets prepared by the method are a pure Chinese medicinal preparation, do not have residue or public hazard, have the effects of inhibiting bacteria, diminishing inflammation, improving microcirculation, improving the resistance of the body and stimulating uterus, and are exact in curative effect. Experiments prove that the effervescent tablets have high cure rate on acute endometritis, chronic endometritis and recessive endometritis of the cows.