Crushing device for weeding machine

The utility model discloses a smashing device for a weeding machine, which comprises a base and a working box, the working box is arranged above the base, the bottom of the working box is communicated with the base, hydraulic cylinders are fixedly connected to two sides of the top end in an inner cavity of the working box, a lifting plate is fixedly connected to the output ends of the hydraulic cylinders, and a motor is fixedly connected to the bottom end of the lifting plate. The upper end of an output shaft of the motor is fixedly connected with a first motor wheel which is connected with a first rotating shaft through a first transmission wheel, and the lower end of the output shaft of the motor is fixedly connected with a second motor wheel which is connected with a second rotating shaft through a second transmission wheel. The top ends of the first rotating shaft and the second rotating shaft are connected with the bottom end of the lifting plate through bearing seats, a plurality of first blades are con