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A new QCD calculation of the B parameter of $K^{0}-\bar{K^{0}}$ mixing ispresented. It makes use of polynomial kernels in dispersion integrals in orderto practically eliminate the contributions of the unknown pseudoscalar strangecontinuum. This approach avoids the arbitrariness and instability inherent tothe Borel exponential kernels used in previous sum rules calculations. Asimultaneous calculation of the mixed quark gluon condensate $\langleg\bar{q}\sigma_{\mu\nu}\frac{\lambda^{a}}{2}\sigma_{\mu\nu}^{a}q\rangle$ whichenters in the expression for B is presented. Finally the K-meson decay constant$f_{K}$ is calculated to five loop

New approach to $K^{0}-\bar{K^{0}}$ mixing