The present invention is one kind of phenanthrene quinone doped methyl methacrylate material and its preparation process. The phenanthrene quinone doped methyl methacrylate material is prepared through mixing methyl methacrylate, azodiisobutyroitrile in 0.5 wt% of methyl methacrylate and phenanthrene quinine in 0.8-1.3 wt%; prepolymerizing at 55-60 deg.c for 2-5 hr; heating to 75-85 deg.c for 15-25 min for chain initiation; fast cooling to 55-60 deg.c and polymerizing for 48-72; and cutting and polishing. It is used as holographic light information storing material and has sensitive light absorption in the wavelength shorter than 550 nm, diffraction efficiency higher than 70 %, high image fidelity, low cost and other advantages.