A stellar flare is a strong energy burst event. Understanding stellar flare is important for determining the properties of stellar magnetic activities. We aim to perform statistical analyses on stellar flare characteristics of different stellar parameters in greater details by using the light curves of TESS survey from July 2018 to October 2020. By using repeated fitting to difference stellar background light curve and flare event, we precisely detected 60810 flare events on 13478 stars from 1-30 sectors of TESS data and determined the flare parameters. After cross-matching our samples with Gaia survey, we obtained more stellar parameters to determine the relationship between the flare parameters and stellar parameters. The fractions of flare stars decrease as stellar temperatures increase in the region 2500-6500K and stellar mass from 0.08 to 1.4M_{sun}_. The flare energies increase as the stellar temperature and the stellar mass decrease. There is a weak relationship between the flare amplitude and Ro. We also confirmed that M-type stars produce flares more frequently than FGK stars. We updated the proportion of flare stars increases from M0 to M5, and decreases from M5 to M7. We obtained the power-law index (1.83-0.15) of the cumulative flare frequency distribution. The index shows a decreasing trend from F to K type stars, and M-type stars rise for dwarf samples. The fraction of flare stars decreased as the vertical absolute height increases in 0-200pc and stable in 200-800pc. We found that eclipsing binary stars more frequent flare than single stars.

Cone search capability for table J/A+A/669/A15/table2 (Stellar parameters of all targets observed by TESS in its 1-30 sectors)