Abstract: Using the NCEP reanalysis data and observation data of lightning monitoring network in sichuan province from July to August, 2013 to 2014 and calculating the value of the lifted index in four layers near surfers(1000hPa, 975hPa, 950hPa, 925hPa), convective available potential energy, the K index and 850hPa false equivalent temperature before the lightning and analyzing the correlation between them. Through this study, the values of convective parameters are significantly different in a day with or without lightning. The convective parameters have a good correlation with the lightning activity in sichuan province. Through this study, the prediction indexes of lightning activity in sichuan province have been obtained, which has certain reference for the prediction of lightning potential.