The structure of pure C-60/stearic-acid LB films and phase transformation during dipping process have been studied by using UV, IR and TEM techniques. The tribological properties of C-60/C-70 LB films and C-60/C-70/behenic-acid LB films have been investigated. During compressing pure C-60/stearic-acid Langmuir films gradually transformed from amorphous to microcrystals. Compared with the spectra of pure C-60 new peaks of the spectra of C-60/stearic-acid LB films are produced, and the absorbing band of -OH disappears. Due to the contribution of C-60 in the LB films to their wear resistance, their wear life is greatly increased.