Abstract: Based on the fact that the acceleration and velocity of underwater acoustic wave in far field has the same direction and a π/2 phase difference, this paper proposes a target orientation method for acceleration type vector hydrophone. The basic principle is:first to calculate the cross-spectrum between pressure and horizontal acceleration as well as the cross-spectrum between pressure and vertical acceleration; then to divide the imaginary part of the first cross-spectrum by the imaginary part of the next one, and finally to find the target direction by taking the arctangent of the quotient. Compared to conventional complex intensity processor, the new method is simple and easy to implement since the integration from acceleration to velocity is no longer needed, which reduces the requirement of filtering. Lake experiment data of optical fiber vector hydrophone show that the new method has similar orientation performance in comparison with the complex intensity processor.