The recent observations and theory indicates that the presence of in nite non-dipolarrnpulsars magnetic elds, it has become more and more clear that pulsars posses magneticrn eld structure, which are much more complicated than the simple assumption of dipolarrnpulsars magnetic elds. In this work, we analyze the presence of in nite non-dipolar com-rnponents of the pulsar magnetic eld, as derived from a recent model. We derived both therndipolar and in nite non-dipolar components of the eld separately. We have approachedrnthe problem by applying post-Newtonian approximation, to nd the in nite non-dipolarrnpulsar magnetic eld. Among in nite non-dipolar components of pulsar's magnetic eld,rnwe have both derived the expression for quadrapole and octupole component of the mag-rnnetic eld and studied their implication