Novel vehicle-mounted water and fertilizer all-in-one machine

The invention relates to the technical field of agricultural engineering, and discloses a fertilizing, spraying and watering integrated vehicle-mounted water and fertilizer all-in-one machine. The fertilizing, spraying and watering integrated vehicle-mounted water and fertilizer all-in-one machine comprises a machine frame, a control system, a fertilizer spreading mechanism, a spraying mechanism and a walking mechanism. The walking mechanism is mainly used for walking of a stepping trolley, and the labor intensity of manual trolley pushing is reduced; the fertilizer spreading mechanism is mainly characterized in that a direct current motor drives a fertilizer spreading disc to rotate, granular fertilizer is spread to the ground under the action of centrifugal force, and the fertilizer spreading process is completed; the angle-adjustable spraying mechanism can adjust the angle between two spraying rods, can realize three different spraying modes of vertical spraying, inclined spraying and horizontal spraying t