The invention belongs to the technical field of ship shipping, and particularly relates to a ship navigation path planning method, which comprises the following steps of: 1, establishing a mathematical model for ship path planning under a ship route, including establishment of an environment model, establishment of a ship route model and establishment of an evaluation standard of a path planning algorithm; 2, researching the marine stall characteristic of the ship, including the influence of the marine environment on the ship speed, the establishment of a meteorological environment, the research of the stall characteristic of the meteorological environment on the ship motion, and the establishment of a calculation method of a critical speed; step 3, establishing a particle swarm algorithm, including establishment of the particle swarm algorithm, establishment of an immune algorithm, combined application of the immune-particle swarm algorithm and simulation analysis of the immune-particle swarm algorithm; and 4, simulation and result analysis of a route design algorithm are carried out, the structure is reasonable, the convergence speed of the obtained particle swarm optimization mixed with the immune algorithm is higher, and the global search performance and the solving process are the best.