The attosecond pulse can be used as a powerful tool for the real-time observation of ultrafast electron dynamics [1–3].It can be used as tools for measuring and controlling the dynamic process of electrons in molecules,especially in ultrafast electron dynamics.Recently,the HHG of atoms have been almost well understood theoretically and experimentally by scientist.Since the interaction between laser and molecules shows more extensive phenomena,such as the multicenter structure,molecular orbital tomographic imaging,the quantum interference between high order harmonics originated from different cores of molecules still need further investigation.Recently,many efforts have been paid to broaden the bandwidth of the supercontinuum of HHG and shorten the pulse duration for the potential applications with much higher time resolutions [4,5].