The invention discloses an irrigation device for camellia chrysantha trees. The device comprises a water tank, a water inlet, pulleys, a water pump, a connecting tube, an injection frame, an injectionhead, a fixed bolt and a water supply pipe; the water inlet is formed in the top of the water tank, the multiple pulleys are installed at the bottom of the water tank, the connecting tube is connected with one side of the water tank, one end of the connecting pipe is connected with the injection frame which is internally provided with the water supply pipe, multiple spray heads are installed at the two ends of the water supply pipe, and the injection frame and the water supply pipe are fixed through multiple fixing bolts. The device has the advantages that the multiple pulleys are arranged atthe bottom of the water tank, the device moves in the camellia chrysantha field conveniently, a T-pipe type water supply pipe is installed inside the injection frame connected to one side of the water tank, the two ends of the water supply pipe are each provided with three spray heads, the spray irrigation efficiency is high, and due to the fact that the water supply pipe and the outer wall of the injection frame are connected through the multiple fixing bolts, the water supply pipe is more stable in use.