The method of treating the flax fiber consists of cleaning, cottonisation, retting and drying of the raw material, which could be short flax fiber No 2, combing wastes and other wastes. The opening of the flax fiber is carried out 3 times: first before the cleaning, second before the retting, and third after drying, which is done after cottonisation. This is carried out by electro-hydraulic treatment to a processed material placed in a liquid. This invention allows for quality improvement of the flax fibers and simplification of the processing.
