One of the potential application of nanofiber technology is the production of nanofiber yarn by electrospinning process. These yarns can be used in various fields, such as medical applications and filtration. Due to the low strength of the nanostructure yarns, hybrid yarns are a unique pattern that develops and improves the properties of salt yarns. On the one hand, in this type of structure, using a common yarn as a core, it is possible to use the good strength of the normal yarn to increasing of strength of the final yarn. On the other hand, by using nano fibers in shell of yarn, it is possible to use the unique properties of nanofibers to improve the desired properties at the yarn surface. The main aim of this research is producing of hybrid yarns by means of coating of polyester multi-filament yarn surface with composite nanofibers containing polyacrylonitrile polymer (PAN) and nano-particles of dimethyl 5-sodium sulfosulfate (SSI) salt coating on the core yarn done well .The properties of electrospun fibers can be modified using the SSI salt. The SSI salt was used due to the nature of its hydrophilicity at the yarn surface to improve the moisture regain content and rasing of the capillary rate. In order to produce hybrid yarn with the highest of capillary uplift of liquid penetration rate and moisture regain, Taguchi methods were designed to test the above mentioned conditions. In order to produce a hybrid yarn with the highest rate of liquid capillary rise and moisture regain, with the helping of Taguchi method, the necessary tests were done to investigate the above-mentioned conditions. In these experiments a group of factors is considered as a variable factor and another group was considered as the response factor and the effect of variable factors on response factors was analyzed and analyzed. Variable factors include polymer concentration, salt concentration, yarn collection rate and core number. The results showed that in all cases, the Lucas-Washburn equation was set. Of course. By plotting the diagram of squared height versus time, the coefficient of capillary rate is obtained by a straight line slope. diagram, the coefficient of capillary rate is obtained by a straight line slope. In the sample of hybrid yarns coated with pure PAN, the nozell variable and polymer concentration are the most effective factor on the capillary and moisture regain. Also, the Taguchi analysis was confirmed using the LSD test and it was found that the change in core number in all states had a significant effect on the liquid capillary rise and the rate of collection velocity has a significant effect on the liquid capillary rise. In the response variable of moisture regain by changing the parameters of the core number of the hybrid yarn coated with pure PAN, and the rate of collection velocity between the different groups showed a significant effect on the moisture regain of the yarn. In the sample of hybrid yarns that they covered with PAN / SSI, the core factor is the most effective factor on the produced yarns capillary and the concentration factor is the most effective factor in absorbing the moisture content of the produced yarn. Using LSD test, the significance of core number and the rate of collection velocity is observed on the rate of liquid capillary rise.