The rheological properties of blends consist of various polyolefin have received much attention in recent years. In present work, strain recovery after shear cessation was studied in immiscible blends composed of Polypropylene/ polyethylene and EPR as compatibilizer. The effect of blend composition (ranging from 20 to 50 wt. % of dispersed phase), and EPR addition (concentration up to 10 wt. % with respect to the dispersed phase) was evaluated and correlated to the evolution of the morphology of the blends. The blends showed three relaxation stages; a first fast relaxation which was attributed to the relaxation of the pure phases, the second one with slower rate, named plateau, which related to droplets relaxation, and the last one with higher relaxation which was interpreted in the present work. On the third step, by increasing the dispersed phase concentration, the relaxation modulus increases, whereas the relaxation rate decreases. The compatiblized blend showed higher relaxation rate at third region that can be related to smaller droplet and narrower droplet size distribution. During the step of preshearing, the droplets elongate and ruptured until a steady state is obtained and the morphology becomes finer and the droplets size smaller. Two important factors affect the third stage, preshear and waiting time. At various preshear rates, the third stage was strongly affected by the magnitude of the shear rate.