The Second LHAASO Collaboration Conference in 2026 & The Academic Symposium for the 10th Anniversary of the LHAASO collaboration

This is a preliminary LHAASO-WCDA analysis of the high-synchrotron-peaked BL Lac object 1ES 1218+304. Using data collected from March 2021 to July 2025, we construct an eight-day light curve, significance maps, and a time-averaged spectral energy distribution (SED), while considering possible source confusion from the nearby 1ES 1215+303 and NGC 4278. The signal is strongest in the low-$N_{\rm hit}$ bins. A Bayesian Blocks analysis of the current weighted light curve finds no clear, statistically significant change point. We describe the observed spectrum with a power law with an exponential cutoff fixed at 10 TeV. And we get the intrinsic spectrum with Saldana-Lopez's EBL model.