10CrNi5MoV high-strength steel intersecting line structure welding method

The invention discloses a welding method for a 10CrNi5MoV high-strength steel intersecting line structure, and belongs to the technical field of welding. The welding method for the 10CrNi5MoV high-strength steel intersecting line structure comprises the steps that a groove is formed in an intersecting line hole of a penetration piece structural component; the penetration piece structural component and the penetration piece are matched and aligned to form a welding seam, and under argon protection, TIG welding is adopted for sequentially conducting positioned welding and backing welding in the welding seam; wherein when the positioned welding is used for firstly welding a side groove surface, TIG (Tungsten Inert Gas) welding is still adopted for backing welding to adjust a welding seam, so that the consistency of groove states of a positioned welding area and a non-positioned welding area of the welding seam is ensured; preheating the groove welding seam until the inter-pass temperature is 80-130 DEG C; under