Abstract: Guidan 662 is a new maize variety which is bred by crossing Gui A10341 as female parent and GML906 as male parent in Maize Research Institute of Guangxi Academy of Agricultural Sciences. In 2017, the average yield of maize in Guangxi was 8 253.6 kg/hm², which was 8.4% higher than that of the control Guidan 162. In 2018, the average yield of maize in Guangxi was 7 348.1 kg/hm², which was 6.5% higher than that of the control Guidan 162. From 2017 to 2018, the average yields of new maize varieties were 9 616.5~9 243.0 kg/hm² respectively, which were 18.2% and 16.6% higher than that of the local variety LVN10, it participated in maize new-variety selection trial and maize contrast test in Natha Province of Laos. In 2019, it was approved by both the Laos Crop Variety Registration （accession number：00080S） and the Crop Variety Certification Committee of Guangxi Zhuang Autonomous Region （accession number：Guishenyu 2019087）. Guidan 662 has strong disease resistance, wide adaptability and good commercial property. It is suitable for planting in all parts of Guangxi and all provinces of Laos.

Key words: maize, newvariety, Guidan 662, breeding, cultivation