The invention provides a new non-asbestos composite reinforced fiber of friction material with low cost and a relative production method, wherein the fiber is environment-friendly, degradable and non-pollution, which can improve the impact strength of friction material. When in use at high temperature, the friction factor is stable with low abrasion. The production method is simple, cheap and suitable for producing friction material. The non-asbestos composite reinforced fiber for friction material contains mine rock wool or gravel-shaped wool of 50-80 parts by weight, fibrilia of 2-10 parts by weight, wood fiber of 3-8 parts by weight, mica powder or ceramic powder of 2-20 parts by weight, and coupling agent or compatibilizer of 1-5 parts by weight. The production method comprises preparing the materials, cutting mine rock wool or gravel-shaped wool, washing via centrifugal machine, removing slag to obtain main fiber, controlling the slag content lower than 0.5-1%, adding fibrilia, wood fiber and mica powder or ceramic powder to be mixed at high speed, drying and spraying coupling agent or compatibilizer, while the drying temperature is 105 to 150 DEG C and the drying time is 1-2h, to obtain composite reinforced fiber.