Underwater blasting adjacent structure protection device

The invention discloses an underwater blasting adjacent structure protection device which comprises a bearing structure, first elastic pieces, a box assembly and a bubble curtain device, the bearing structure is used for being connected with a protected main body and is provided with bearing parts arranged in a criss-cross mode, and the multiple first elastic pieces are arranged on the sides, away from the protected main body, of the bearing parts; the box assembly is arranged in front of the bearing structure and abuts against the first elastic piece, and the bubble curtain device is arranged on the side, away from the bearing structure, of the box assembly. During underwater blasting, shock waves of blasting can be reduced through the bubble curtain device, the box assembly can block residual shock waves and flying rocks, vibration can be buffered and the stress area of a protected main body can be increased through the first elastic piece and the bearing structure, and therefore impact borne by the protect