The invention discloses a ship auxiliary launching system and aims to provide the ship auxiliary launching system capable of solving the problem in the prior art that a ship body is damaged by that the ship body and a dock are liable to collide in the process of dragging the ship in the dock to a corresponding berth by a tugboat. The ship auxiliary launching system comprises a pair of mounting bases and thrusters, wherein the pair of mounting bases are distributed on the left side and the right side of the ship body and are arranged on the outer side surface of the ship body; the thrusters arein one-to-one correspondence with the mounting bases and are arranged on the corresponding mounting bases; each thruster comprises an outer cover, a plurality of flow guide channels, propellers and adriving motor; the flow guide channels are formed in the outer cover sequentially from top to bottom; the propellers are arranged in the flow guide channels in a one-to-one correspondence way; the driving motor is used for driving the propellers; and the flow guide channels extend along the front-and-back direction of the ship body.