.Natural fibers have much received attention howadoys due to conmfor property and ecological reasons. There are many plants available in Thailand for producing textile fiber. Fiber producing from lotus is of interestin this researcl as its stem and abundancy .The Fiber was produced from lotus by breaking its stem and pulling anart ,yarn of lotus fiber was received by hand spinning. To study the improvement of strength of lotus yarn,0.1 w/v sodium alginate, clitosan and sodium hydroxide were used in co spinning and post spinning stage. The recieved yarns will tested for strength and analyzed for thermal be haviour