2,4,6-trinitrobenzaldehyde(TNBD) was prepared by oxidizing reaction of 2,4,6-trinirotoluene with potassium permanganate,and the target product N-methyl-(2,4,6-trinitrophenyl)-fullerenopyrrolidine (MTNPF) with a yield of 74.3%(based on consumed C₆₀) was synthesized by the 1,3-dipolar cycloaddition reaction of TNBD with ［60］fullerene and sarcosine. The structure of MTNPF was identified by UV-vis,IR,NMR and MS. Moreover,the thermal stability of MTNPF was studied by TG-DSC,and it was proved that MTNPF has good thermal stability.