The invention provides synthesis of an imidazole-ion-containing photocurable monomer and an application of the photocurable monomer in a self-repairing material. The synthesis of the photocurable monomer comprises the following steps: bifunctional acrylate, imidazole and organic base are added to a reactor, and an intermediate product 1 is obtained; the product 1 is subjected to reaction with haloalkane, and the imidazole-ion-containing photocurable monomer is obtained. The self-repairing photocurable material is obtained from the imidazole-ion-containing photocurable monomer, other monomers and a photoinitiator under the action of ultraviolet light. The synthesis has the following beneficial effects: (1) the synthesized imidazole-ion-containing photocurable monomer can be quickly cured under the action of ultraviolet light; (2) the synthesized imidazole-ion-containing photocurable monomer has good compatibility with other monomers, and performance of the material can be adjusted by changing the ratio of the monomer to other monomers; (3) the photocurable material can be endowed with self-repairing performance by the synthesized imidazole-ion-containing photocurable monomer, safetyof the photocurable material is effectively improved, the service life of the material is prolonged, and environmental pollution is reduced.