High-concentration composite reactive dye

A high-concentration composite reactive dye belongs to the fine chemical field, relating to the preparing method of the high-concentration composite reactive dye. The invention is characterized in that: the invention discloses a high-concentration composite reactive dye, which comprises any type or more types of compound formula (I), any type or more types of compound formula (II), any type or more types of compound formula (III) and any type or more types of compound formula (IV); according to the percentage by weight, I to II to III is equal to (5-55) to (20-85) to (0-25), and (I plus II plus III) to IV is equal to (100-50) to (0-50). The invention has the beneficial effects that: remixed black and brown dyes possess high exhaust dyeing rate and color fixing rate and excellent level dyeing property, build-up property and repeatability, thereby the dye is particularly suitable to be used in short liquor ratio dyeing of cellulose fiber and polyamide fiber.