  In this paper, we consider the Boussinesq equations with magnetohydrodynamics
convection in the domain $\mathbb{T} \times \mathbb{R}$ and establishes the
nonlinear stability of the Couette flow $(\mathbf{u}_{sh} = (y,0),
\mathbf{b}_{sh} = (1,0), p_{sh} = 0, \theta_{sh} = 0$). The novelty in this
paper is that we design a new Fourier multiplier operator by using the
properties of the enhanced dissipation to overcome the difficult term
$\partial_{xy}(-\Delta)^{-1}j$ in the linearized and nonlinear system. Then, we
prove the asymptotic stability for the linearized system. Finally, we establish
the nonlinear stability for the full system by bootstrap principle.
