Anti-floating design is very important for subway design,and it greatly affects the cost of construction.There are several controversy about design parameters,anti-floating calculation.The writer researches on latest codes and expert opinions,and introduces the confirmation of waterproof location,anti-floating design and measures of anti-floating.The writer states personal views about the divergences,and propose personal methods and advices about problems of subway station antifloating design on the basis of features of subway engineering.