One of the structural vibration control systems is steel slit dampers mounted at the beam to column structure and absorbing a fairly large portion of the input energy under the metal flowing mechanisms. Research in this field shows that these dampers are able to withstand a large number of loading cycles to reach the rupture stage. Also, structures with this damper exhibit sustained hysteresis behavior due to the relative changes in the relative positions of the floors. Therefore, this study does not investigate the effect of split height distribution on stress droplet behavior in beam to column joints with the aim of increasing The energy absorption and the improvement of the performance of the slit damper in the connection of the beam to the column have been made. The results of the examination of the samples in the finite element software showed that by distributing the height of the slots to the small and large slit in a one to one with a specific ratio Relative to the state where the slit were distributed at the same height