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In order to develop and improve the professional lightning earlywarning/nowcasting service products and their timeliness, this paper calculates the distance for each grid between the lightning occurring in the first 5 periods of early warning and the grids on the basis of 6min and 0.01°×0.01° grids, and on the foundation of the lightning nowcasting and early warning model controlled by the radar thresholds. According to the size and changing trend of lightning approaching grid distance, the early warning rules are determined, and the nowcasting warning products of the occurrence of lightning in the grids and key areas in the next 6 minutes are generated. The prediction success rate of the model is evaluated quantitatively and qualitatively. The results show that compared with the traditional method of relying on radar threshold control for lightning nowcasting and early warning, the prediction accuracy of grating and region is improved, and the calculation speed is faster, which can be applied to the practical and especially operational lightning nowcasting and early warning service.