With the rapid development of the power industry, the system has put forward new requirements for the lightning arresters used for the protection of high-voltage equipment. These requirements include environments such as switch cabinets with small internal space, high-altitude mountainous and plateau areas, and areas with heavy pollution and high creepage distance. To meet this requirement of customers, our company has developed and produced a fully insulated composite jacketed metal oxide lightning arrester with a base integrated unit. The main body and insulating base of this product are formed by a single piece of high-quality silicone rubber through one-time molding, featuring good sealing performance, simple structure, high dielectric strength, large creepage distance, and light weight. This product has effectively solved the problem of insufficient insulation caused by the small installation space.