Two-piece set type anti-wrinkle bed sheet

The utility model relates to the technical field of bed sheets, and discloses a two-piece set type anti-wrinkle bed sheet which is applied to a mattress. Comprising a bottom sheet cover, a positioning insertion rod, a surface sheet and a buckle structure. Wherein the bottom single cover is arranged on the lower part of the mattress in a sleeving manner; the bottom single cover comprises a cover body arranged below the mattress in a sleeving manner and positioning insertion cylinders arranged at four corners of the cover body; one positioning insertion rod is embedded and inserted in each positioning insertion cylinder in a matched manner; the surface sheet is laid on the top surface of the mattress; and the surface sheet is detachably connected with the cover body through the plurality of buckle structures. The two-piece set type anti-wrinkle bed sheet provided by the utility model is not easy to shift and fall off, the bed sheet is prevented from being loosened and wrinkled, meanwhile, the operation process