The invention discloses a method and device for generating an all-region-covering optimal working path for a farmland plot. The method comprises the following steps of: forming
headland turning
modes such as a semicircular turning mode, a
pear-shaped turning mode, a fish-
tail-shaped turning mode and the like by considering the working requirements of
tractor units of different types and scales inconsistence with the practical requirement of
agricultural machinery operating management; putting forward a plurality of working path optimization standards of the
tractor units to realize optimization targets such as minimum turning, lowest turning working consumption, a shortest working path, an optimal effective working path ratio and the like; establishing an optimal working direction search method and a working path generating
algorithm of the
tractor units on the basis of priori information such as a working plot vector, a working unit parameter, a path optimization target and the like to realize all-region-covering of the farmland plot; and integrating
embedded hardware devices of functional modules such as a storage module, an input module, an output module, auxiliary equipment and the like to realize planning, calculating, displaying and introducing of the all-region-covering optimal working path for the farmland plot and recording, storing and displaying the practical working path of each tractor unit.