The invention relates to the technical field of welding, in particular to a submerged-arc welding technology for a T-shaped connector. The submerged-arc welding technology includes the following steps that firstly, a groove is formed in a web and is arranged in a K shape; secondly, a wing plate and the web are assembled to form a component; thirdly, a liner is installed at the position of the groove in the back face, and the component is adjusted to a boat-shaped jig frame; and fourthly, welding is conducted, wherein bottoming welding is conducted on the front face firstly, weld joint welding is conducted on the back face secondly, and other weld joint welding is conducted on the front face finally. According to the technology, the step of carbon arc back chipping is omitted, welding deformation is reduced, the welding production efficiency is improved, and the labor intensity of welding personnel is lowered; and meanwhile, generation of noise and harmful gas is reduced, the field operation environment is improved, and the physical health of workers is protected.