Automatic lifting guardrail applied to child bed

The utility model discloses an automatic lifting guardrail applied to a children bed, which comprises a bed body, a lifting mechanism and a lifting mechanism, the guardrail assembly comprises a crossrod and a plurality of vertical rods; the vertical rod is a telescopic rod body formed by sequentially sleeving a plurality of hollow sleeves from bottom to top; the vertical rods are symmetrically arranged on the two sides of the bed board respectively, the first ends of the vertical rods are connected to the bedside of the bed board, and the second ends of the vertical rods are vertically upward. The cross rods are parallel to the bed board, and the second ends of the vertical rods are connected with the cross rods respectively to form guardrails of the bed body; the vertical rod is sleevedwith the air bag, and the bottom face and the top face of the air bag are connected with the first end of the vertical rod and the lower surface of the transverse rod respectively; the sliding rails are arranged at the four co