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