From the fresh bulbs of Fritillaria monatha Migo., ten compounds were isolated and identified as peimine (1), peiminine (2), isovertifine (3), pengbeimine A(4), pengbeimine B(5), pengbeimine C(6), pengbeimine D(7),stearic acid (8), daucosterol (9) and campesterol (10). Their structures were determined by NMR, MS spectral data.