Opening protection assembly of immersed tube steel shell

The invention discloses an opening protection assembly of an immersed tube steel shell. The opening protection assembly comprises a protection net and at least two limiting pieces, wherein the protection net covers the opening end of an opening; the protection net comprises a protection net body and reinforcing pieces wound around the periphery of the protection net body; the limiting pieces are arranged on the side face, right opposite to the opening, of the protection net body in a protruding manner; and the limiting pieces are inserted in the opening. The protection net body covers the opening end of the opening, the protection function is provided through the protection net body, workers are prevented from falling or falling injuries from the opening and large objects are prevented from falling into the opening during manufacturing of an immersed tube tunnel, and the construction safety of the immersed tube tunnel can be effectively guaranteed. The reinforcing pieces are arranged on the periphery of the p