Solid propellant burning rate is highly dependent on the pressure, so that the combustion duration propellant rocket engines, combustion vibration leads to considerable changes in pressure. This could lead to an explosion in rocket engines. The best case is propellant combustion independent of pressure. Ballistic modifiers added to propellant formulation for reduce pressure sensitivity and reduce or increase of burning rate also. Lead and copper salts are materials that create plateau and mesa in double based propellant. In this article, mechanism of create plateau and mesa by burning rate catalysts investigated.