Research conclusions:The existing experience should be learnt in the design and construction of the welded base for 100 m long steel rai.l The reasonable verification should bemade forconstruction of thewelded base for100m long steel rail on consideration of the requirement of the railway network in China. The all factors should be taken into account whenmaking decision. The site choice of thewelded base should satisfy the demand of the railway network and reduce the influence on environmen.t The arrangementofwelded base should satisfy the demands of the railwelding process of the production line, with a compact and reasonable arrangement and no interferences among the all production operations. The reasonablenessof the overallarrangementof thewelded base should be tested by realproduction so as to gainmore experience fordesign of similarwelded base.