Meiosis is an important mechanism in the eukaryotes adaptive evolution of eukaryotes. Here, we identified 14 meiotic genes in eight ciliates and studied their molecular evolution. The results show that: (1) Specific meiotic genes lost and duplication were found in ciliates; (2) meiotic genes are conserved in ciliates; (3) Recombination process in meiosis belong to class II type in ciliates, which was not common in other eukaryotes. These results indicated that meiosis in ciliate may represent the original style, and may be a good model to study the origin and evolution of eukaryotic meiosis process.