The invention discloses a method for realizing thunder and lightning space-time clustering, belonging to the technical field of lightning prevention. The method comprises the steps of: obtaining a thunder and lightning data information collection L to be clustered; dividing the thunder and lightning data information collection into a plurality of sub-collections Cn based on time attribute; performing spatial clustering analysis on each sub-collection Cn based on spatial attribute, and sequencing clustering results according the sequence of the time attribute; and storing the sequenced clustering results in a km1 file format, wherein n is not less than 1. The method for realizing thunder and lightning space-time clustering overcomes the technical problem that a discharge centre is difficult to make a decision due to discreteness of thunder and lightning data in the prior art (decision made by the thunder and lightning centre is affected by edge thunder and lightning), and has the characteristics of fast rate of convergence and high clustering accuracy.