A submarine pipeline relocation process without stopping production in a dry normal-pressure environment includes the steps: firstly, excavating foundation operating pits, mounting a plurality of dry cabins in the operating pits respectively to enable an original submarine pipeline and a newly laid submarine pipeline to enter the insides of the dry cabins, and then performing hermetic water draining for the dry cabins so that dry environments are formed in the dry cabins; secondly, mounting two perforated plugging devices at two ends of the original submarine pipeline respectively, and connecting a bypass pipeline between the two perforated plugging devices; thirdly, perforating and plugging the original submarine pipeline to enable delivered media to circulate in the bypass pipeline; and fourthly, butting an orifice at one end of the original submarine pipeline and an orifice at one end of the newly laid submarine pipeline through a bend, and closing one of bypass branches to enable the media to circulate in the bend and enter the newly laid submarine pipeline. The submarine pipeline relocation process without stopping production in the dry normal-pressure environment is capable of achieving pipeline relocation without stopping production, economic losses caused by production stop are avoided, and construction period is shortened while production cost is saved.