The invention provides an underwater suspension bridge for a fisherman boat to pass through, and relates to a device for underwater recreational equipment to pass through. The underwater suspension bridge mainly comprises a suspension bridge body, wire ropes, an upright post, a bridge rotating shaft, a fixing device of the bridge rotating shaft, a pin shaft for connecting the bridge with a hatchway, a pin shaft fixing lug, a windlass and the like. When the underwater suspension bridge works, one end of the bridge body rotates around the fixed shaft to a position to be in parallel to an outlet/inlet hatchway; the other end of the bridge body is fixed with a lateral lug plate of the outlet/inlet hatchway; and tourists can enter an underwater fisherman boat body safely after the bridge body is placed horizontally and fixed, so as to experience interesting in underwater fishing. The underwater suspension bridge has the advantages that the structure is designed to be simple, safe and reliable; and the cost is low. Therefore, the underwater suspension bridge is an underwater recreational equipment passing device with a high popularization value.