  We investigated the electroweak corrections from one-loop diagrams involving
the third generation (s)quarks to the decay width of process $\tilde{\chi}_1^+
\to W^+ \tilde{\chi}_1^{0}$ in the framework of the Minimal Supersymmetric
Standard Model. Our calculation shows that these corrections are not very
sensitive to the mass of the lightest neutralino $\tilde{\chi}_1^{0}$ and the
sbottom mixing angle $\theta_{b}$, but depend strongly on the top squark mixing
angle $\theta_{t}$ and tan$\beta$. With our chosen parameters, we find that
these radiative corrections can exceed 10%, therefore they should be taken into
account for the precise experimental measurement at future colliders.
