The utility model belongs to the technical field of the pontoon bridge and specifically relates to an aerify pontoon bridge, including first pontoon bridge and second pontoon bridge, first pontoon bridge one end is provided with and is used for fixing the fixed component on the bank, the other end of first pontoon bridge is provided with first pivot, another left and right sides limit of first pontoon bridge all is provided with the second rotational pin, second pontoon bridge both ends all are provided with the second pivot that is used for with first pivot hinged joint, be connected through slider -crank mechanism between first pontoon bridge and the second pontoon bridge, slider -crank mechanism is provided with two sets ofly, set up the left and right sides limit in first pontoon bridge and second pontoon bridge junction respectively. The utility model discloses linking to each other with the plastic housing of connecting plate with pontoon bridge head and the tail, having guaranteed the rigidity of connecting, connect the pontoon bridge as safety device with slider -crank mechanism, the crank is drawn backward and is makeed that the bolt is automatic to be injected in the groove as the safety arrangement of two pontoon bridges connections when aerifing, and simple structure has very strong practicality simultaneously.