Abstract. Aiming at the high complexity and low coverage ratio of existing coverage enhancing algorithms in directional wireless sensor network, a coverage enhancing algorithm based on numerical analysis and greedy iteration is proposed. The proposed algorithm adjusts the sensor direction by way of greedy iteration, until all sensor directions reach local optimum. Meanwhile, in the process of greedy iteration, greedy iteration is used to simplify the area calculation to reach the reduction of the complexity of the proposed algorithm. The simulation demonstrates that the proposed algorithm is well convergent with high coverage rate and medium execution time.