A folding mechanism, comprising a base, a first housing seat, a second housing seat, a first screen supporting plate, and a second screen supporting plate, wherein: the first housing seat is disposed on the first screen supporting plate, and the first screen supporting plate is rotatably fitted with the first housing seat; the second housing seat is disposed on the second screen supporting plate, and the second screen supporting plate is rotatably fitted with the second housing seat; the first housing seat and the first screen supporting plate are arranged on a first side of the base, and the second housing seat and the second screen supporting plate are arranged on a second side of the base, the first side and the second side being arranged facing away from each other; the folding mechanism further comprises a hinge mechanism, wherein the hinge mechanism comprises a first swing arm, a second swing arm, a third swing arm, and a fourth swing arm, both the first swing arm and the third swing arm are arranged on a same side as the first housing seat, the second swing arm and the fourth swing arm are arranged on a same side as the second housing seat, the first swing arm is opposite to the second swing arm, and the third swing arm is opposite to the fourth swing arm; characterized in that, a first end of the first swing arm is rotatably connected to the base, a second end of the first swing arm is rotatably connected to the first housing seat, a first end of the third swing arm is rotatably connected to the base, a second end of the third swing arm is in sliding fit with the first housing seat, a second end of the third swing arm is slidably and rotatably fitted with the first screen supporting plate, and a rotation axis of the first end of the first swing arm and a rotation axis of the first end of the third swing arm are distributed at an interval; and a first end of the second swing arm is rotatably connected to the base, a second end of the second swing arm is rotatably connected to the second housing seat, a first end of the fourth swing arm is rotatably connected to the base, a second end of the fourth swing arm is in sliding fit with the second housing seat, a second end of the fourth swing arm is slidably and rotatably fitted with the second screen supporting plate, and a rotation axis of the first end of the second swing arm and a rotation axis of the first end of the fourth swing arm are arranged at an interval. the first housing seat is disposed on the first screen supporting plate, and the first screen supporting plate is rotatably fitted with the first housing seat; the second housing seat is disposed on the second screen supporting plate, and the second screen supporting plate is rotatably fitted with the second housing seat; the first housing seat and the first screen supporting plate are arranged on a first side of the base, and the second housing seat and the second screen supporting plate are arranged on a second side of the base, the first side and the second side being arranged facing away from each other; the folding mechanism further comprises a hinge mechanism, wherein the hinge mechanism comprises a first swing arm, a second swing arm, a third swing arm, and a fourth swing arm, both the first swing arm and the third swing arm are arranged on a same side as the first housing seat, the second swing arm and the fourth swing arm are arranged on a same side as the second housing seat, the first swing arm is opposite to the second swing arm, and the third swing arm is opposite to the fourth swing arm; characterized in that, a first end of the first swing arm is rotatably connected to the base, a second end of the first swing arm is rotatably connected to the first housing seat, a first end of the third swing arm is rotatably connected to the base, a second end of the third swing arm is in sliding fit with the first housing seat, a second end of the third swing arm is slidably and rotatably fitted with the first screen supporting plate, and a rotation axis of the first end of the first swing arm and a rotation axis of the first end of the third swing arm are distributed at an interval; and a first end of the second swing arm is rotatably connected to the base, a second end of the second swing arm is rotatably connected to the second housing seat, a first end of the fourth swing arm is rotatably connected to the base, a second end of the fourth swing arm is in sliding fit with the second housing seat, a second end of the fourth swing arm is slidably and rotatably fitted with the second screen supporting plate, and a rotation axis of the first end of the second swing arm and a rotation axis of the first end of the fourth swing arm are arranged at an interval.