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The real-world applications of ocean acoustic field computations present serious computational requirements for high performance computing technologies. At the same time, more and more engineers and researchers are using parallel processing technologies to improve computational performance using emerging parallel hardware architectures. In this paper, we introduce latest parallel computing technologies to ocean acoustics computation, after analyzing parallel computing requirements of computational ocean acoustics models, especially normal mode method. Then, parallel algorithm of WKBZ mode approach is put forward. Experimental results on multi-core and cluster systems are given respectively. At last, the cost performances of different parallel systems for ocean acoustic computation are also discussed.