In this work we introduce a new plateau-like inflationary model including a quadratic scalar potential coupled non-minimally to gravity .
This potential has a dominant constant energy density at early times which can realize successful inflation .
It also includes an infinitesimal non-zero term V _ { 0 } responsible for explaining dark energy which causing the universe to expand accelerating at the late time .
We show that this model predicts small tensor-to-scalar ratio of the order of r \approx 0.01 which is fully consistent with Planck constraints .
Using the lower and upper bounds on reheating temperature , we provide additional constraints on the non-minimal coupling parameter \xi of the model .
We also study the preheating stage predicted by this kind of potentials using numerical calculations .