Polymer dielectrics are widely used both in academic research and industrial applications.The effect of trapped charges on dielectric properties of the polymer dielectrics is critical for more intelligent utilization of these materials.Herein we report the charge-induced polymer relaxation and its dynamic characteristics reflected by the local dewetting and discharging of polymer electrets with charge patterns.The difference in charge-induced relaxation results in selective dewetting of thin polymer films under heating or solvent annealing.The effect of trapped charges on relaxation was also studied via measuring the mechanical properties of homopolymers with charge patterns.Furthermore,the dynamic properties of charges which relate to film thickness,temperature and relation time are also addressed by monitoring the discharging regularity.These results demonstrate that the charge trapped in polymer electrets could accelerate relaxation and drive the dewetting process of thin polymer films,which are also closely related to polymer properties.