The invention discloses a small-size multi-core glue-filling sealing electric connector. The connector comprises a metal support ring, an epoxy glue main body and contact pins. The metal support ring is arranged on one end of the epoxy glue main body. There are several contact pins and the contact pins penetrate the epoxy glue main body and the metal support ring. The metal support ring, the epoxy glue main body and the contact pins form one body through glue filling. The metal support ring and the contact pins are taken as embedded components and carry out glue filling during epoxy glue main body glue filling, and are tightly wrapped so as to become one body through the epoxy glue main body glue filling. The metal support ring is tightly engaged with the epoxy glue main body along a groove and a hole of an axial direction, which achieves anti-torsion and tension-resistance effects on an epoxy glue. The epoxy glue main body and a pin ring groove are tightly sealed and cooperated. When a product is compressed, pressure on the contact pins can be transmitted to a support ring through the epoxy glue main body and the metal support ring bears the pressure; high hydraulic pressure resistance performance of a connector is greatly increased; and simultaneously connector failure generated because the contact pins are escaped from the connector when the pressure is increased suddenly is avoided.