Abstract: In order to develop the power of torpedo weapon and guarantee the safety of our troops, shooting forbidden zone of homing torpedo was studied. The definition and influence factors of shooting forbidden zone of torpedo weapon were introduced, and the principle of dividing forbidden zone was analyzed. Taking MK 46 torpedo for example, the shooting forbidden zones of the shipborne-launched, airdrop-launched and rocket-assisted-launched torpedoes were analyzed and calculated. The shooting forbidden zone plots under three launch modes were given in order to offer a reference for the operational application of homing torpedo, such as to determine whether our troop falls into the zone or not and how withdraws from the zone.