Resistance to downy mildew, Turnip mosaic virus (TuMV), black rot, verticillium wilt and clubroot were evaluated by inoculation under controlled conditions at seedling stage in 203 Chinese cabbage inbred lines from 2012 to 2014. The result showed that 7 lines were highly resistant to downy mildew, 9 to TuMV, 0 to black rot, 31 to verticillium wilt and 12 to clubroot. Out of 203 inbred lines, 82 showed resistant to only one of these diseases, 62 ones showed resistant to two kinds of diseases, 28 lines showed resistance to three disease and 4 lines showed resistance to 4 diseases. The data also showed that inbred lines, 11-234, 04-622, 12-85, 13-108 and 09-894, were elite materials for disease resistance breeding. In addition, the difference of disease resistance was observed among three types of Chinese cabbage for spring, summer and autumn cultivation, which also existed among four heading types.