The invention discloses an energy-saving metachromatic fine denier fiber production system, and belongs to the field of spinning process equipment. In the energy-saving metachromatic fine denier fiber production system, adaptability improvement and process optimization are carried out on multiple parts in the production system, so that the problem that metachromatic fibers manufactured by means of a production system in the prior art have obvious rough and fine joint filaments in the longitudinal direction and consequently definite difficulty is brought to the weaving process is solved, and the problems that woven fabric is rough and the real silk simulation effect is poor due to the fact that the metachromatic fibers manufactured through the production system in the prior art are adopted are also solved. Thus, shell fabric manufactured through metachromatic fibers obtained by means of the production system has hand feeling and luster just like real silk and also has a natural multicolored style, the deep and shallow grain contrast, the length and the like can be freely designed according to needs, and the requirements of different clients are further met better.