Pneumatic folding lifting guardrail of tank car

The pneumatic folding lifting guardrail comprises a left guardrail body and a right guardrail body, each of the left guardrail body and the right guardrail body comprises an upper cross beam, a lower cross beam, an air cylinder and a vertical beam, the upper cross beams are rotationally connected with the vertical beams, the ends, away from the upper cross beams, of the vertical beams are rotationally connected with the lower cross beams, and the lower cross beams are fixed to a tank car frame; the upper ends of the two ends of the left guardrail and the right guardrail are fixedly connected together through horizontal beams respectively, side beams are rotationally connected to the middles of the horizontal beams and parallel to the left guardrail and the right guardrail, an air cylinder is rotationally connected to the vertical beam close to the tail of the tank car, and the end, away from the vertical beam, of the air cylinder is rotationally connected to a tank car frame. The utility model is in a folded