Chinese cabbage is a major vegetable variety in China. At present, studies on Chinese cabbage molecular breeding has gained remarkable achievement. Along with its introduction and plantation in countries all over the world, Chinese cabbage has gradually become a globle vegetable and attracted the attention of worldwide resarchers. So studies on distribution of intellectual property about Chinese cabbage molecular breeding and the competition pattern becomes very important. Aiming at Chinese cabbage molecular breeding, taking pattent literatures as research object, adopting information science method of combining qualitative and quantitative research, using patent retrieval tools of DII, TDA, and data analysis tools, this paper retrieved, classified, tidied and analyzed the patent in the field of Chinese cabbage molecular breeding. Besides, the paper also studied on the variation trend, core countries/regions, core patent owners, technology distribution, and research hot spots of patent applications in this field. The results indicated that studies on Chinese cabbage molecular breeding had entered into a rapid development stage. Three east Asia countries were the major forces for Chinese cabbage molecular breeding. Universities and national scientific research organizations were the main research forces. Gene cloning, identification, development of molacule marker and germplasm resources innovation are the major research directions for molecular breeding.
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