A rotatory shaft kit, comprising: a rotatory shaft assembly, comprising a protective shell and a first bracket arranged on the protective shell; wherein a first accommodating space is defined in the first bracket; two rotating assemblies; wherein one of the two rotating assemblies is arranged on a side of the rotatory shaft assembly, and the other of the two rotating assemblies is arranged on another side of the rotatory shaft assembly opposite to the side; each rotating assembly comprises a rotating plate, a first rotating member, and a second rotating member; the first rotating member is connected to the rotating plate at an end of the rotating plate, and the second rotating member is connected to the rotating plate at another end of the rotating plate opposite to the end; the first rotating member is at least partially disposed in the first accommodating space and is rotatable relative to the first bracket; and two housing assemblies; one of the two housing assemblies is arranged on the side of the rotatory shaft assembly, and the other of the two housing assemblies is arranged on the another side of the rotatory shaft assembly; each housing assembly comprises a second bracket and a fixing plate connected to the second bracket; a second accommodating space is defined in the second bracket; the second rotating member is at least partially disposed in the second accommodating space and is rotatable relative to the second bracket; characterized by further comprising: two compensation assemblies; wherein one of the two compensation assemblies is on the side of the rotatory shaft assembly, and the other of the two compensation assemblies is arranged on the another side of the rotatory shaft assembly; an end of each compensation assembly is rotatably connected to the first bracket, and there is a spacing between a rotation center of each compensation assembly and a rotation center of a corresponding first rotating member; the other end of each compensation assembly is connected to a corresponding housing assembly, and the corresponding housing assembly is slidable relative to the each compensation assembly such that a distance between the fixing plate and the compensation assembly is adjustable; each compensation assembly comprises a compensation plate, and the compensation plate comprises a first end and a second end that are opposed to each other. a rotatory shaft assembly, comprising a protective shell and a first bracket arranged on the protective shell; wherein a first accommodating space is defined in the first bracket; two rotating assemblies; wherein one of the two rotating assemblies is arranged on a side of the rotatory shaft assembly, and the other of the two rotating assemblies is arranged on another side of the rotatory shaft assembly opposite to the side; each rotating assembly comprises a rotating plate, a first rotating member, and a second rotating member; the first rotating member is connected to the rotating plate at an end of the rotating plate, and the second rotating member is connected to the rotating plate at another end of the rotating plate opposite to the end; the first rotating member is at least partially disposed in the first accommodating space and is rotatable relative to the first bracket; and two housing assemblies; one of the two housing assemblies is arranged on the side of the rotatory shaft assembly, and the other of the two housing assemblies is arranged on the another side of the rotatory shaft assembly; each housing assembly comprises a second bracket and a fixing plate connected to the second bracket; a second accommodating space is defined in the second bracket; the second rotating member is at least partially disposed in the second accommodating space and is rotatable relative to the second bracket; characterized by further comprising: two compensation assemblies; wherein one of the two compensation assemblies is on the side of the rotatory shaft assembly, and the other of the two compensation assemblies is arranged on the another side of the rotatory shaft assembly; an end of each compensation assembly is rotatably connected to the first bracket, and there is a spacing between a rotation center of each compensation assembly and a rotation center of a corresponding first rotating member; the other end of each compensation assembly is connected to a corresponding housing assembly, and the corresponding housing assembly is slidable relative to the each compensation assembly such that a distance between the fixing plate and the compensation assembly is adjustable; each compensation assembly comprises a compensation plate, and the compensation plate comprises a first end and a second end that are opposed to each other. two compensation assemblies; wherein one of the two compensation assemblies is on the side of the rotatory shaft assembly, and the other of the two compensation assemblies is arranged on the another side of the rotatory shaft assembly; an end of each compensation assembly is rotatably connected to the first bracket, and there is a spacing between a rotation center of each compensation assembly and a rotation center of a corresponding first rotating member; the other end of each compensation assembly is connected to a corresponding housing assembly, and the corresponding housing assembly is slidable relative to the each compensation assembly such that a distance between the fixing plate and the compensation assembly is adjustable; each compensation assembly comprises a compensation plate, and the compensation plate comprises a first end and a second end that are opposed to each other.