Abstract: The progress of solid-state polymerization is reviewed. Solid-state polymerization can be performed by heat initiation, high energy/UV irradiation, and electrode excitation. Because it has the features of lower activation energy, high purity, and controllabel structure during polymerization, it is widely applied in the fields of plastics, medicine and health care, molecule imprinting and micro-patterning. The prospect of its development is also predicted.