The invention relates to a new pipeline connection method and manufacturing craft by which the internal coating of a pipeline can be free from damage continuously. The pipeline connection method is a method of making use of the internal and external double-layer structure to connect the pipeline. The internal and external double-layer structure comprises a main pipe, an external-layer pipe and aninternal coating layer; the continuous connection of the pipelines without damage is finished by the connection of a plurality of internal and external double-layer structures and the infusion of curable resin materials. The new pipeline connection method is suitable for all welding pipes, in particular to the anti-corrosion protection of the joints of the pipeline which transport corrosive property inside. The invention still relates to the application of the technique that the internal and external double-layer structure in the internal coating layer of the delivery pipe is free from damagecontinuously. The new pipeline connection method has the advantages that the connection method of the internal and external double-layer structure can avoid the damage of the internal anticorrosive layer by heat input in welding, thus ensuring the integrity of the internal anticorrosive layer of the pipeline and the corrosion resistance of the internal coating layer of the pipeline.