In order to eliminate inter symbol interference caused by strong scattering in ultraviolet communication, one delay decision equalization algorithm based on least mean square-maximum likelihood estimation (LMS-MLE) with channel estimation was adopted. The theoretical analysis and simulation verification were carried out. The appropriate decision delay depth was selected to adjust the LMS adaptive filter tap coefficient for channel tracking, and to obtain a new channel estimation vector. Finally, the optimal sequence output was obtained by using the MLE equalization algorithm. The results show that, the algorithm can obviously improve the performance of ultraviolet communication system. Without increasing the complexity, the performance is close to the optimal MLE equilibrium algorithm. And the channel tracking can be achieved. The optimal delay of the algorithm in ultraviolet (UV) communication is 20. This result is helpful for improving the performance of UV communication and engineering implementation of MLE equalizer.