A bed frame convenient for changing bed sheets, the bed frame comprising: a base; a rotation module for accommodating a mattress located above the base; a sliding module located between the rotation module and the base; a sliding device located between the sliding module and the base, wherein the sliding module is able to slide along a length of the base through the sliding device;and a rotation device located between the sliding module and the rotation module, wherein the rotation module is able to rotate around a central axis of the sliding module through the rotation device; the sliding device either comprises a slide rail on the base, a sliding block matched with the slide rail is located at a bottom surface of the sliding module, and wherein the slide rail is arranged along the length direction of the base; the number of the slide rail is at least two; or, the sliding device comprises a slide slot on the base, a sliding part which is able to be embedded and roll in the slide slot is located at a bottom surface of the sliding module, and wherein the sliding part is a pulley or an universal ball, the slide slot is arranged along the length direction of the base; the number of the slide slot is at least two; the rotation device comprises a rotation assembly located between the sliding module and the rotation module, the rotation module rotates through the rotation assembly; the rotation assembly either comprises a bearing seat located on the sliding module, and a rotation shaft rotatably connected with the bearing seat and located on the rotation module; or, the rotation assembly comprises a big rotation disk, wherein a top surface of the big rotation disk is fixedly connected with rotation module, a bottom surface of the big rotation disk is fixedly connected with the sliding module; or, the rotation assembly comprises a small rotation disk and multiple rotating parts, a top surface of the small rotation disk is fixedly connected with the rotation module, a bottom surface of the small rotation disk is fixedly connected with the sliding module, the rotating parts evenly arranged around the small rotation disk are provided on the sliding module, the rotating parts are universal balls or universal wheels. a base; a rotation module for accommodating a mattress located above the base; a sliding module located between the rotation module and the base; a sliding device located between the sliding module and the base, wherein the sliding module is able to slide along a length of the base through the sliding device;and a rotation device located between the sliding module and the rotation module, wherein the rotation module is able to rotate around a central axis of the sliding module through the rotation device; the sliding device either comprises a slide rail on the base, a sliding block matched with the slide rail is located at a bottom surface of the sliding module, and wherein the slide rail is arranged along the length direction of the base; the number of the slide rail is at least two; or, the sliding device comprises a slide slot on the base, a sliding part which is able to be embedded and roll in the slide slot is located at a bottom surface of the sliding module, and wherein the sliding part is a pulley or an universal ball, the slide slot is arranged along the length direction of the base; the number of the slide slot is at least two; the rotation device comprises a rotation assembly located between the sliding module and the rotation module, the rotation module rotates through the rotation assembly; the rotation assembly either comprises a bearing seat located on the sliding module, and a rotation shaft rotatably connected with the bearing seat and located on the rotation module; or, the rotation assembly comprises a big rotation disk, wherein a top surface of the big rotation disk is fixedly connected with rotation module, a bottom surface of the big rotation disk is fixedly connected with the sliding module; or, the rotation assembly comprises a small rotation disk and multiple rotating parts, a top surface of the small rotation disk is fixedly connected with the rotation module, a bottom surface of the small rotation disk is fixedly connected with the sliding module, the rotating parts evenly arranged around the small rotation disk are provided on the sliding module, the rotating parts are universal balls or universal wheels. the rotation assembly either comprises a bearing seat located on the sliding module, and a rotation shaft rotatably connected with the bearing seat and located on the rotation module; or, the rotation assembly comprises a big rotation disk, wherein a top surface of the big rotation disk is fixedly connected with rotation module, a bottom surface of the big rotation disk is fixedly connected with the sliding module; or, the rotation assembly comprises a small rotation disk and multiple rotating parts, a top surface of the small rotation disk is fixedly connected with the rotation module, a bottom surface of the small rotation disk is fixedly connected with the sliding module, the rotating parts evenly arranged around the small rotation disk are provided on the sliding module, the rotating parts are universal balls or universal wheels.