The invention relates to the fibre assistant field, in particular relates to a process for health preserving bast fibres and a jute fibre specific health preserving assistant used in the same. this invention provides a process of health preserving bast fibres, wherein, comprising the steps of: a. spraying the prepared assistant on bast fibres, wherein, the weight proportion of said assistant and said bast fibres ranges from 0.4:1 to 0.5:1. b. placing the bast fibres processed through step a in a first health preserving container for 2-3 days; c. taking out the bast fibres processed through step b from the first health preserving container, turning over such bast fibres, and placing them in a second health preserving container; then heating such bast fibres upto 50-60 □, after that, storing the heated bast fibres in said second health preserving container for 5-6 days.