Platform door for rail transit

The invention relates to a platform door for rail transit, which comprises two fixed doors, the two fixed doors are arranged left and right at an interval, side boxes are arranged on the sides, close to each other, of the two fixed doors, a front door structure, a rear door structure and two driving mechanisms are arranged between the two side boxes, and the front door structure and the rear door structure are located behind the side boxes; the rear door structure comprises two rear sliding doors, a gap is formed between the two rear sliding doors, and the rear sliding doors are in one-to-one correspondence with the side boxes; according to the platform door for the rail transit, a large-opening-degree channel is adopted, the size of the door body is reduced, the gravity and the load of the door body are reduced, the stability of the door body structure is guaranteed under the action of wind pressure loads, the requirements of the large opening degree (distance) for the door opening time and the kinetic energ