The invention discloses a ball feeder for tennis training. The ball feeder comprises a support frame, a ball storage box, a ball conveying pipeline, a power mechanism and a ball hitting structure. A mounting base is arranged in the middle of the support frame and is connected with the power mechanism. The ball hitting structure is connected with the lower portion of the ball conveying pipeline and the power mechanism. A support block on the upper portion of the support frame is connected with the lower portion of the ball conveying pipeline. The hopper-shaped ball storage box is connected with the upper portion of the ball conveying pipeline. Tennis balls are placed in the ball storage box. A temporary storage box used for storing to-be-hit tennis balls temporally is arranged on the lower portion of the ball conveying pipeline. The upper portion of the temporary storage box is connected with the lower end of the ball conveying pipeline through a tapered cavity. A bottom opening is formed in the lower end of the temporary storage box and is matched with the ball hitting structure. The ball feeder has the advantages of simple structure, reliability in use, convenience in disassembling, assembling and carrying, wide speed regulation range, high regulation accuracy and applicability to training requirements of diffident levels of users.