The invention relates to a spraying machine, in particular to a convenient spraying machine for irrigation and water conservancy. The technical purpose of providing the convenient spraying machine which is high in spraying speed and long in spraying distance for irrigation and water conservancy is achieved. In order to achieve the technical purpose, the convenient spraying machine for irrigation and water conservancy comprises a base plate, universal wheels, a side plate, a driving mechanism, a water delivery mechanism, a linkage mechanism, a lifting mechanism, a fixing mechanism, a top plate, a spray head, a first flat belt, a second flat belt, a water delivery pipe, a first check valve, a water pump pipe and a second check valve; the universal wheels are fixedly connected to the bottom of the base plate, the fixing mechanism is fixedly connected to the bottom of the base plate and located between the universal wheels, and the side plate is fixedly connected to the base plate in the vertical direction. Accordingly, farmland can be fully sprayed, and the rapid farmland spraying effect is achieved.