Control method and controller for walking system of spreader

The control method for walking system of spreader includes feeding the rotation speeds of both right and left motor for comparison with the given values, and controlling the rotation speeds via a PID regulator to form a core loop; feeding the speed difference of the right motor and left motor to trace zero target and controlling the speed of one motor via a speed difference PID regulator to constitute a speed difference tracing correction loop; and feeding the accumulated speed difference of the right motor and left motor to trace zero target and further regulate the speed in the speed difference tracing correction loop via a displacement difference PID regulator to form a displacement difference tracing correction loop. All the core loop, the speed difference tracing correction loop and the displacement difference tracing correction loop constitute one closed-loop control system for the walking system of spreader. The present invention has high operation comfortability and high construction quality.