This invention relates to a one-process for producing ramie plied yarn and sectional dyeing. It provides a kind of spinning technology without combing for a dimity, to use raw ramie directly made into plied yarn manually, through a specialized degumming technology to form a one-process ramine plied yarn and sectional dyeing. Said technics lowering down the investment of equipments and producing costs. The one-process ramie plied yarn to compare with the producing ramie plied yarn by machines, it will cut down the cost of about 8000 yuan perton. The sectional dyeing will fulfil the needs of ramie fibre knitting technology.