The problem of target recognition with millimeter wave high resolution polarimetric radar was studied. The definition of instantaneous polarization Wigner Ville distribution(InPolWVD) was given, and its Moyal′s formula was derived, which implies the equivalence between the correlation of InPolWVDs in time frequency domain and the correlation of polarimetric signals in time domain. Then, a novel target recognition method was proposed based on the correlation of InPolWVDs. Experiments of demonstrating recognition with five kinds of aircraft targets were presented. The results show that it is an effective target recognition method of high resolution polarimetric radar.