Based on the characteristics of NBA sports news and text broadcast, a method of automatic writing of NBA sports news is proposed. According to the score difference of two teams, the score difference function is constructed. A data slice algorithm and a data synthesis algorithm based on the character of score difference function are proposed. The live data slices are classified, and the template library of NBA sports report is constructed according to the category of data and the history of the NBA sports news reports. The information of data piece is filled into the template with the team and the player’s performance as the center, and an automatically generated NBA sports news release can be obtained. Four indicators are put forward to measure the quality of automatic writing NBA sports news. The experiments show that the proposed method is effective and feasible, the writing speed is fast, and it can help the news writing of the event.