We present the study of dynamical evolution of the Galactic Globular Cluster NGC 6656 using Blue Straggler stars. We have used a combination of multi-wavelength high-resolution and wide-field sample to cover large cluster region. We have determined the center of gravity and construct the most extended projected star density profile. The star density profile is well reproduced by a standard King model in the inner region with core radius rc ~ 89".8. A significant deviation from the flat core behavior has been detected in the innermost region (r < 10") and it may be due the presence of the stellar mass black holes. The outer part is fitted with a power law suggesting that the formation of the cluster was in a dwarf galaxy environment and then accreted later to the Milky way. We have estimated the BSS population and constructed its radial distribution out to r ~ 626". A total of 57 BSSs have been identified. We have also determined the average mass of the BSSs to be 1.06 +/- 0.09 Mo. Their radial distribution is found to be bimodal, with a well defined minimum at r ~ 250" and external upturn in the outer region. We have also determined A+ parameter which was found to be 0.173 +/- 0.026. Present analysis conclude that NGC 6656 is a cluster of intermediate dynamical age.