The invention discloses a preparation method of a Chinese medicine irrigation solution for treating erosive type chronic cervicitis, belonging to the technical field of preparation method of Chinese medicines. At present, generally, antibiotics and sulfanilamide medicines are used for treating erosive type chronic cervicitis, and the disadvantage is large toxic and side effect. The Chinese medicine irrigation solution disclosed herein is prepared by putting 29 kinds of herbs consisting of verbena, Galium aparine, dysosma versipellis, wikstroemia indica, saururus chinensis, radix berberidis, folium isatidis, garden euphorbia herb, Pennywort Herb, Rohdea japonica Roth, Aster ageratoides, radix sophorae tonkinensis, edible tulip, senecio scandens, Huperzia serrata, Japanese stephania root, thymifoious euphorbia herb, meadowrue root and rhizome, purslane, leaf of Chinese coriaria, sodaapple nightshade herb, radix scutellariae, coptidis rhizome, cortex phellodendri, Broomjutre Sida Herb, ovateleaf holly bark, starwort root, Chinese Iris seed and liquorice in water for soaking, then decocting with slow fire, filtering and removing the residues to obtain a liquid medicine. The Chinese medicine irrigation solution disclosed herein has the advantages of simple preparation, small toxic and side effect, short treatment course and high cure rate.