Ship linetype monitoring method

The invention discloses a ship linetype monitoring method which comprises the following steps: S1, after a ship is assembled, establishing a ship coordinate system by taking the center of a ship rudderstock as a reference according to the center line of a dock; s2, taking the ship coordinate system as a reference, and respectively measuring actual coordinates of rib position lines and actual coordinates of a waterline of a port and a starboard of the ship by using a total station; s3, calculating a deviation value between the actual coordinate and the design coordinate according to the measured actual coordinate, and drawing an actual linear graph of the ship; s4, carrying out a ship navigation simulation test according to the actual ship linetype graph, and testing whether the actual ship linetype affects the actual ship navigation speed or not; and S5, if the influence exists, correcting the ship according to the deviation value, and repeating the steps S2 to S4 until the actual line type of the ship does n