The present invention provides a rubber tourniquet for increasing elongation formed by a rubber composition. The rubber tourniquet has two opposite surfaces that both have a pattern formed by a fabric. The rubber composition includes 100 parts by weight of isoprene rubber, 50 to 10 parts by weight of inorganic filler, 2 to 5 parts by weight of vulcanizing agent, 5 to 10 parts by weight of organic filler, and 10 to 20 parts by weight of plasticizer. The rubber composition does not include proteins. The rubber composition of the instant disclosure is used instead of natural latex for producing tourniquet, thereby avoiding the allergic reaction that may initiated by proteins in natural latex. In addition, by adjusting and selecting the content of each component in the rubber composition, the tourniquet products produced can exhibit excellent elongation property.本創作公開一種用於提升伸長率的橡膠止血帶,其由一種橡膠組成物所製成。橡膠止血帶的兩相反表面都具有由織物所形成的壓紋。橡膠組成物包含100重量份的異戊二烯橡膠、50至100重量份的無機填充劑、2至5重量份的硫化劑、5至10重量份的有機填充劑以及10至20重量份的塑化劑,且橡膠組成物不含有蛋白質。本創作的橡膠組成物可以取代天然乳膠來製造橡膠止血帶,如此一來,可以避免天然乳膠內所含的蛋白質使得使用者發生過敏反應。再者,通過調配橡膠組成物中各組份的比例,可以使得所製成的橡膠止血帶產品具有優異的伸長率。1‧‧‧橡膠止血帶11、12‧‧‧表面