A folding mechanism for a foldable mobile phone, comprising: a base; a support body, wherein the support body is connected to the base, is provided with a first groove and a second groove that are corresponding to each other in position, and the support body may move toward or away from the base; a first swing arm (22, 25), wherein the first swing arm comprises a first rotating portion and a first rotating body fastened to the first rotating portion, the first rotating portion is rotatably connected to the base, a part of the first rotating body extends into the first groove, and the first rotating body is configured to provide a force for the support body in a rotation process, so that the support body moves toward or away from the base; and a second swing arm (22, 25), wherein the second swing arm comprises a second rotating portion and a second rotating body fastened to the second rotating portion, the second rotating portion is rotatably connected to the base, a part of the second rotating body extends into the second groove, and the second rotating body is configured to provide a force for the support body in a rotation process, so that the support body moves toward or away from the base; wherein the support body comprises a first fixing plate and a second fixing plate that are disposed opposite to each other and a third fixing plate connected between the first fixing plate and the second fixing plate, and the third fixing plate separates space between the first fixing plate and the second fixing plate into the first groove and the second groove; and wherein the second fixing plate is closer to the base than the first fixing plate, a size of the second fixing plate in a second direction is greater than a size of the second fixing plate in a first direction perpendicular to the second direction, a size of the second fixing plate in the first direction is less than a size of the first fixing plate in the first direction, and wherein the first rotating portion of the first swing arm (22, 25) and the second rotating portion of the second swing arm (22, 25) are configured to rotate about axes orientated in the first direction. a base; a support body, wherein the support body is connected to the base, is provided with a first groove and a second groove that are corresponding to each other in position, and the support body may move toward or away from the base; a first swing arm (22, 25), wherein the first swing arm comprises a first rotating portion and a first rotating body fastened to the first rotating portion, the first rotating portion is rotatably connected to the base, a part of the first rotating body extends into the first groove, and the first rotating body is configured to provide a force for the support body in a rotation process, so that the support body moves toward or away from the base; and a second swing arm (22, 25), wherein the second swing arm comprises a second rotating portion and a second rotating body fastened to the second rotating portion, the second rotating portion is rotatably connected to the base, a part of the second rotating body extends into the second groove, and the second rotating body is configured to provide a force for the support body in a rotation process, so that the support body moves toward or away from the base; wherein the support body comprises a first fixing plate and a second fixing plate that are disposed opposite to each other and a third fixing plate connected between the first fixing plate and the second fixing plate, and the third fixing plate separates space between the first fixing plate and the second fixing plate into the first groove and the second groove; and wherein the second fixing plate is closer to the base than the first fixing plate, a size of the second fixing plate in a second direction is greater than a size of the second fixing plate in a first direction perpendicular to the second direction, a size of the second fixing plate in the first direction is less than a size of the first fixing plate in the first direction, and wherein the first rotating portion of the first swing arm (22, 25) and the second rotating portion of the second swing arm (22, 25) are configured to rotate about axes orientated in the first direction.