The effect of annealing and polarizing temperature on the trap level distribution in nylon 11 film electrets has been studied by thermally stimulated depolariza tion current (TSDC) technique. It was found that there were four detrapping curr ent peaks of space charge in TSDC spectra of the quenched nylon 11 film electret , while two in that of the annealed one. Using multi-point method to fit the ex perimental curves, the detrapping current peaks could be separated and the trap depth was obtained. The results further proved that there were four trap levels of space charge in a quenched electret and the trap level distribution changed l ittle when the polarization temperature increased; while after annealing, there were only two trap levels in the electret. The results also showed that the shal lower trap level was obviously close to the deeper trap level when the polarizat ion temperature increased.