Adaptation method based on improved marine main engine load simulation model

The invention provides a rapid adaptation method based on an improved ship main engine load simulation model. The rapid adaptation method comprises the steps that the improved ship main engine load simulation model is constructed; according to ship and propeller data corresponding to the engine model, setting structural parameters in a ship main engine load simulation model; if the engine is a medium-speed engine or a high-speed engine, configuring a reduction gear box model according to a reduction ratio; setting the check coefficient as a recommended value, and operating the ship main engine load simulation model; the 75% load working condition is calibrated, the shaft torque under the working condition serves as a checking target, the checking coefficient is iteratively modified, and the simulation result and the checking target have no deviation; the checking targets are adjusted, checking of the remaining checking targets is completed, and it is ensured that errors under all working conditions are within