The utility model provides plant protection machinery. A frame (1) is provided with a spreading cantilever (11) for spreading medicinal liquid. The plant protection machinery is characterized in that an engine (E) is loaded on the front parts of a left main framework (33L) and a right main framework (33R) which form the frame (1) a medicinal liquid tank (5) is loaded on the rear parts of the left main framework (33L) and the right main framework (33R) a speed changing box (2) and a plant protection pump (10) which is used for conveying medicinal liquid from the medicinal liquid tank (5) to the spreading cantilever (11) are loaded on the left main framework (33L) and the right main framework (33R) between the engine (E) and the medicinal liquid tank (5). According to the plant protection machinery, the configuration of the plant protection pump with relatively heavy weight can be changed, so that the rear balance of a machine body can be improved.
