The invention discloses a process for producing natural elastic yarn-dyed fabrics with mulberry boiled-off silk wefts, and belongs to the technical field of production of natural elastic yarn-dyed fabrics with mulberry silk. The process includes warp preparation, weft processing, yarn dyeing and after finishing. Warps are made of 23 dtex mulberry raw color silk f1, weft processing sequentially includes steps of doubling, primary twisting, primary type approval, coiling, degumming, dyeing, sizing, heavy twisting and secondary type approval, and doubling includes carrying out zero-twist doublingon every four 4 pieces of 23 dtex mulberry raw silk f1; primary twisting is carried out under the condition of 500 twist/meter in S twist directions; primary type approval is carried out at the temperature of 80 DEG C for 40 min; sizing slurry comprises sodium alginate with the mass concentration of 5 g/L, the bath ratio is 1:15, and heat is preserved at the temperature of 50 DEG C for 20 min; the twist directions of strong twisting are identical to the twist directions of primary twisting, and strong twisting is carried out under the condition of 2600 twists/meter; secondary type approval iscarried out at the temperature of 90 DEG C for 60 min; after finishing includes hot water loose type low-tension type approval, the bath ratio is 1:10, water is heated until the temperature of the water reaches 60 DEG C, heat is preserved at the temperature of 60 DEG C for 30 min, and after finishing is carried out to obtain the natural elastic yarn-dyed fabrics which are finished products. The process has the advantages that the natural elastic yarn-dyed fabrics are easy to weave, the mulberry boiled-off silk wefts for weaving the natural elastic yarn-dyed fabrics are low in type approval temperature and little in strength damage after being twisted, and the natural elastic yarn-dyed fabrics have good hand feeling.