The invention relates to a sealing type electric connector with an arc-shaped interface. The sealing type electric connector comprises a shell, a protection cover, a sealing ring A and a plurality ofcontact pins; the shell has an arc-shaped end plane A; the protection cover has an arc-shaped end plane B; the protection cover and the shell are connected together through a fastening apparatus to enable the arc-shaped end plane A to be parallel to the arc-shaped end plane B; the sealing ring A is distributed in the combination surface of the protection cover and the shell; and the multiple contact pins and the shell are sintered together through a vitreous body. By adoption of the technical scheme provided by the invention, the connector can be mounted on a circular arc-shaped interface, andunification between the connector and the mounting interface can be maintained, so that the overall appearance of the connector is ensured while reliable sealing property in the connector can be realized; and the protection cover and the fastening apparatus and the like adopt a metal material, so that the manufacturing cost is lowered, the overall structural intensity of the connector is improved, and the service life of the connector is prolonged.