The invention relates to a straight slope groove shoulder retaining structure at the rail bearing groove of a concrete sleeper, which comprises a spike structure, fasteners, gauge adjustment and height adjustment, and is characterized in that the height from the end of the sleeper to the shoulder retaining concrete is increased by 20mm, the gauge baffle thickness is10mm, and the rubber pad thickness is14mm; Thick; The shape of the baffle seat is adapted to the shape of the groove of the rail bearing groove, and its thickness is increased according to the assembly requirements, and the gauge baffle is consistent with the groove of the baffle seat.