Abstract :In past few decades it has been proved that tachyon scalar field is a very promising candidate of dark energy and it provides explanation of accelerated universe as well as coupling between different components (dark energy, matter, radiation) of scalar fields. In this article we analyze non-miniamlly coupled tachyonic scalar fields to find the variation of tachyonic potential(????(????)) with time(????) with the change of equation of state(????).