This paper considers the initial boundary problem to the planar compressible
magnetohydrodynamic equations with large initial data and vacuum. The global
existence and uniqueness of large strong solutions are established when the
heat conductivity coefficient κ(θ) satisfies \begin{equation*}
C_{1}(1+\theta^q)\leq \kappa(\theta)\leq C_2(1+\theta^q) \end{equation*} for
some constants q>0, and C1,C2>0.Comment: 19pages,some typos are correcte