Multifunctional yarn-dyed imitation jean fabric comprises warps and wefts and is formed by interweaving the warps and wefts. Front lines of the multifunctional yarn-dyed imitation jean fabric inclineto the right; a body of the multifunctional yarn-dyed imitation jean fabric has a sequential yarn passing of 1, 2, 3, 4, 5, 6, 7 and 8, one yarn forms each heald, and four yarns form each reed; the multifunctional yarn-dyed imitation jean fabric comprises edges 9 and 10. A weaving process of the multifunctional yarn-dyed imitation jean fabric comprises warping, sizing, weaving, gray cloth pre-shaping, special fermenting, desizing, singeing, loose drying, shaping, and preshrinking. The multifunctional yarn-dyed imitation jean fabric provided herein is of low carbon, good in environmental friendliness, bright in color and free of fading, has soft texture, good elasticity and good breathability, the weaving process of the multifunctional yarn-dyed imitation jean fabric is also provided, the multifunctional yarn-dyed imitation jean fabric is completely of jean style from external view, and the problem that traditional jean fades in color and loses color during washing is solved.