Automatic weeding device

An automatic weeding device includes a machine shell, a radiator, push rods, a cooling fan, a power source and a controller. Front wheels and rear wheels are disposed on the bottom of the machine shell; the radiator is disposed on the top of the machine shell; two side parts of the machine shell are connected with the bottoms of the push rods; the cooling fan is disposed on the push rods near thetop of the radiator; an air outlet of the cooling fan is disposed right opposite to the top of the radiator; the controller is disposed on one side part of the radiator; the controller includes a metal shell, an input power line, an output power line, an input conducting plate, an output conducting plate, an inclined slide plate, a conductive rolling ball and a wax block; the right end of the inclined slide plate is connected to the right side wall of the metal shell; and the left end of the inclined slide plate is connected to the left side wall of the metal shell. The automatic weeding device is high in heat dissipa