The invention discloses a modernized tennis training device which comprises a tennis court provided with a middle blocking net, a transverse guide rail is arranged above the tennis court, a controllable electric sliding block is correspondingly arranged on the transverse guide rail, and a fixing frame is arranged at the bottom of the electric sliding block. A controllable rotary lamp holder is correspondingly mounted on the fixing frame, and a spotlight is correspondingly mounted on the rotary lamp holder. According to the invention, a trainee can take the aperture as a striking point for training, at the moment, the sensor is not started, whether the aperture is struck or not is manually observed, counting is conducted, the rotating angle of the rotating lamp holder can be controlled through the control unit of the central processing unit, and the position of the corresponding spotlight is also changed; the aperture can be changed to any position of the tennis court, the trainee can carry out multiple times of training at a certain point, the position of the aperture can be continuously changed, the trainee can continuously change the batting position, the batting accuracy can betrained, and the reaction capacity can be exercised.