The high-precision radar target & simultaneous pulsed polarization measuring method requires high orthogonality of transmitting waveform. However， in practical applications， it is often difficult to transmit precise pulsed polarization measuring waveforms that meet the requirements of time width， bandwidth， and high orthogonality at the same time. A high-precision simultaneous pulsed polarization measuring method based on oblique projection filtering is proposed. Due to the nature of no orthogonality of the linear subspaces by oblique projection filtering algorithm， this method can obtain high-precision pulsed polarization measuring results with non-ideal orthogonal waveforms. Simulation results show that compared with the conventional simultaneous pulsed polarization measuring methods based on matched filtering， this method can reduce the amplitude and phase measurement errors of target polarization parameters and greatly improve the precision of simultaneous pulsed polarization measurement.