Abstract: In order to study the performance and surface adhesion behavior of high frequency electrosurgical unit, 304 stainless steel electrode was used for electrical cutting on fresh pork fillet in vitro. The effect of cutting rate on electrode temperature and cutting power on thermal damage and adhesion quality, and the mechanism of tissues adhered on the electrode surface were studied. The results show that the electrode temperature increases with the increase of the cutting power and moving rate. During the cutting process, cells break up to form micron particles and then accumulate on the surface of electrodes to form adhesion layer. The low thermostability of 304 leads to slight melting, which enlarges the bonding area between the adhesive and the matrix. Elements diffusion and enrichment are found at the edge of the adhesives and the electrode, which contributes to higher bonding force.