Identification and Parameter Determination of F-type Herbig Stars from LAMOST DR8

We identify 20 F-type Herbig stars and provide a list of 22 pre-main-sequence candidates from LAMOST DR8. The effective temperature, distance, extinction, stellar luminosity, mass, radius are derived for each star based on optical spectra, photometry, Gaia EDR3 parallaxes, evolutionary tracks. According to spectral energy distributions, 19 belong Class II YSOs, one belongs the flat-spectrum class. Four have Spitzer IRS which three show extremely weak polycyclic aromatic hydrocarbons emissions, with both amorphous crystalline silicate emissions share similar parameters at same stage. detect solar-nearby outbursting EXor J034344.48+314309.3, possible precursor Ae star. Intense emission lines HI, HeI, OI, NaI, CaII originated rapid accretion during outbursts detected in its features infrared spectrum. also make statistic analysis disk properties all known using defined indices. proportion moderate excesses decreases as temperature increases. majority precursors (F-, G-, or K- type) excesses. Hotter tend larger large trends may be due fact that hotter areas re-emitting dust, although there is some scatter particularities disk.