A number of theoretical problems, such as dynamic movement of molecular chains, present themselves in melt electrospinning, yet these important issues have not been thoroughly studied. In this article, a mesoscale simulation method called dissipative particle dynamics was used to study tentatively the dynamic movement of molecular chains, seeing as the diameter of spun fibers is of nanoscale dimensions, belonging to the mesoscale domain in physics. Results show that the downward traces of melting fibers are close to those obtained experimentally, the drop velocity is closely related to electrical force, the structures of the fibers differ with changes of temperature, and chain length varies at distinct descending periods.