Potato (Solanum tuberosum) originated in the highlands of South America, where it has been consumed for more than 8000 years, and introduced into China over 400 years. Today, potato is the fourth most important food crop in the world, with annual production approaching 300 million tons. Because of useing traditional chop tuber as seed multiplication, it is easy to spread disease and pest espacialy viruses and moth resulting in degradation of tube and reducting of output. A method of producing virus-free potato minitubers is a new technology by combing biotechnology and soilless culture and industrialized production. It's belong to our compant patent invinted by prof. Wang bingjun. She is also founder of our company.