In this paper, mixed convection of viscoelastic fluid at the lower stagnation point on a magnetic sliced sphere is investigated. Dimensional governing equation and boundary condition of the problem are further developed. The dimensional governing equation and the boundary condition are further transformed into non-dimensional form using non-dimensional variables. We further obtain non-linear partial differential equation. The non-linear partial differential equation and non-similarity transformation with the consideration of the effect of magnetohydrodynamic (MHD) are solved numerically by using Keller-box method. The influences of sliced sphere magnetic field on viscoelastic fluid flow and heat transfer are then discussed. The results depicted that the uniform magnetic field produced by Lorentz force and slicing on the sphere act as determining factors for the trend of viscoeleastic fluid movement and controlling the cooling rate of the sphere surface.