The invention discloses a plant ash removing device. The plant ash removing device comprises a cart, a machine shell and a dust collection motor; a filtering drum is arranged in a lower cabin, an airexhausting pipe is arranged on the machine shell, and a fixed pipe is arranged on the air exhausting pipe; an inner join pipe, an elastic corrugated pipe and a main gas ejector pipe which are sequentially communicated are arranged on the fixed pipe, an outer cover frame is arranged on the main gas ejector pipe, and is clamped to the fixed pipe, the inner join pipe and the elastic corrugated pipe are located in the fixed pipe, and the outer side wall of the inner join pipe and the inner side wall of the fixed pipe are fixedly sealed; a dust collection pipe penetrating through the bottom of themachine shell and a cart plate is arranged on the machine shell, the upper end of the dust collection pipe is located in the lower cabin, a vertical partition plate is arranged in the lower cabin, theinside of the lower cabin is divided by the vertical partition plate into a dust collecting cavity and a working cavity, a vertical plate hole is formed in the vertical partition plate, the upper endof the dust collection pipe is communicated with the vertical plate hole, and an ash cleaning opening is communicated with the dust collecting cavity. The plant ash removing device has the advantagesthat dust collection, isolation and air exhausting functions can be automatically completed, a user only needs to conduct pushing operation, moving cleaning can be achieved, dead angles can be injected through clean air, the cleaning range is wide, and the adaptability is high.