The invention discloses a manufacturing method for a flexible connector for first-aid repair of a submarine cable, and relates to a manufacturing method for the flexible connector for the submarine cable. The conventional manufacturing method for the flexible connector is relatively troublesome in process, relatively long in working period and not suitable for quick and high-quality first-aid repair for cables on sea surface. The manufacturing method comprises the following steps of 1) performing basic processing on a cable before manufacturing the connector; 2) performing copper wire welding; 3) performing fine milling on a reaction force cone; 4) recovering a semi-conductive shielding layer of a conductor; 5) performing extrusion molding and preheating on the connector; 6) performing extrusion molding and external packaging on the connector; 7) performing high-temperature and high-voltage insulation and sulfuration; 8) recovering the external shielding layer insulativity; 9) performing X-ray insulation examination; and 10) recovering welding of a lead tube sheath. By adoption of the above steps in the technical scheme, the manufacturing speed of the connector is accelerated, the first-aid repairing time of the submarine cable is shortened, the working efficiency of an electric power operator is improved, and loss and inconvenience caused by damage of the submarine cable to a user are reduced.