Unmanned travelling system and method for automatic slag salvaging and loading of rotational flow well

The invention relates to an unmanned travelling system and method for automatic slag salvaging and loading of a rotational flow well. The unmanned travelling system comprises an embedded module, a PLC, a laser distance measuring sensor and a plurality of encoders, wherein the laser distance measuring sensor and the encoders are connected with the PLC; the two laser distance measuring sensors are installed on the middle line of the trolley along the two running rails, laser needs to avoid blocking of a grab bucket and is perpendicular to the ground of a slag loading position, and the two laser distance measuring sensors are used for scanning the boundaries of a truck compartment; the PLC collects data of the laser distance measuring sensor, packages synchronously sampled laser distance data and driving position coordinates and sends the packaged data to the embedded module, and the embedded module calculates the length, width and height of a truck compartment and compartment slag loading position coordinates a