A new area of electrode applications,wearable electrode in smart textile,attracts many researchers.This new type of wearable electrodes integrated on clothing can be used to monitor and collect continuously data on a wearers movement and heart rate with the help of the bio impedance spectroscopy.This kind of electrodes should be flexible and ventilate.Furthermore,they directly perform at human body when people wear them.Complicated environments,such as sweat of human,influence stability,reliability,and other mechanical and electrical properties of the flexible electrodes.Reproducibility,repeatability,and lifetime of the electrodes also play a very important role in practical applications and fabrications of electrodes.To investigate these characteristics of flexible electrodes and to direct the practical application,electrochemical behaviour in electrolyte can be studied by AC impedance spectroscopy technique.However,relative work had been rarely reported.In the present work,different structures of new kind of flexible electrodes were fabricated from 3-dimensional stainless steel mesh.Their electrochchemical behaviour was examined using ac impedance spectroscopy in NaCl electrolyte.Models of electrical equivalent circuit were used to elucidate the mechanistic of the electrodes.The results show that dominant features depend on the structures of the electrodes.Protect layer of the electrodes forms a layer of obstruct between conductor fibres and electrolyte.That makes the relaxation process longer and diffusion process become dominant.