The invention provides a low-resistance DUP elastic strip for fixing an expressway railway track. The elastic strip comprises a toe end (1), a middle leg (2) and a toe end bottom (3), wherein the toe end bottom (3) is arranged at the bottom of the toe end (1); the middle leg (2) comprises a first straight rod part (2-1), a first bent part (2-2) which is connected with the first straight rod part (2-1), a second bent part (2-3) which is connected with the first bent part (2-2), a second straight rod part (2-4) which is connected with the second bent part (2-3), a third bent part (2-5) which is connected with the second straight rod part (2-4), and a fourth bent part (2-6) which is connected with the third bent part (2-5). The DUP elastic strip has the technical effects that corresponding load can reach 8kN-11Kn at 11.5-14.5mm during deformation of the toe end of the elastic strip, the buckling stress of the elastic strip is 8.2kN-10.5kN in a standard group state of the elastic strip, namely, the toe end deforms by 13mm, the residual deformation is not larger than 0.6mm after the elastic strip is subjected to a residual deformation test, and the fixing requirement of bridge fixed tracks is met.