Abstract: The estimation of the source polarization always accompanied with the direction-of-arrival (DOA) estimation because of the polarization diversity of conformal array manifold. A blind DOA estimation method with polarization diversity is proposed in this paper taking account of the characteristic of conformal array antenna DOA estimation when the incident signals are assumed to be statistically independent non-Gaussian narrowband random processes. It is shown how the extended-array due to fourth-order cumulants of the array outputs and estimation of signal parameters via rotational invariance techniques (ESPRIT) algorithm to decouple the DOA and signal polarization parameters. The proposed method achieves high-resolution 2D DOA estimation without no source polarization and the element pattern. The new method has widely applications in a variety of conformal carriers such as cylindrical, conical and spherical carriers. The procedure is given and the mechanism is derived by taking cylindrical conformal array antenna as an example. Finally, Monte Carlo simulations are provided to illustrate the effectiveness of the proposed algorithm.