Abstract: At the present stage, “Maintenance bilingual education” should best fit the bilingual teaching of Molecular biology for the Master candidates in agricultural universities in China. For the initial stage of the curriculum, “using Chinese as the main teaching language and pervading English properly” which resembles “Maintenance bilingual education” should be regarded as the teaching mode. For the middle and later stages of the curriculum, “using Chinese and English equally as the teaching language” which resembles “Transitional bilingual education” should be regarded as the teaching mode. For the method-selecting of the bilingual teaching of Molecular biology for the Master candidates in agricultural universities in China, three basic principles, namely “centering the students in the course of teaching”, “proceeding teaching activities in an orderly way and step by step” and “laying equal stress on teaching the students the expertise and promoting them to raise English and Chinese simultaneouly”, ought to be followed, and the concrete methods mainly include “teaching students in accordance with their individual aptitude”, “praising and encouraging the students in order to help them strengthen their confidence to face the bilingual teaching” and “realizing the interactions between the teacher and the students”.