Rare B Decays in Supersymmetry without R-parity

We perform the complete computation of the contributions to $b\to s+\gamma, b\to s e^{+}e^{-}, b\to s\sum \nu_{i} \bar{\nu}_{i}$ in supersymmetric model with bilinear R-parity violation. We compare our calculations with the evaluations in SM and the experimental results. We find that the supersymmetric contributions can be quite large in those processes. From the analysis and experimental results, we can get some constraints on the mass spectrum in the model.