The invention discloses a diving board capable of preventing the collision injury. The diving board comprises a diving board body, a diving board telescoping mechanism, a first detection and judgment device and a central control processing device. The diving board telescoping mechanism comprises a motor, a gear, a rack and a motor controller. The gear is connected with an output shaft of the motor, the rack is arranged on the bottom of the diving board body, and the first detection and judgment device is composed of a pressure sensor, an infrared emitter, an infrared receiver and an infrared controller. The infrared emitter is arranged on the front side face of the portion, stretching to a diving pool, of the end of the diving board body, when it is detected that the pressure at the front end of the diving board body disappears the infrared controller sends out an infrared ray emission signal to the infrared emitter, when secondary interrupt happens in the process that the infrared receiver receives the signal, a first collision signal is sent out, the output shaft of the motor rotates in the forward direction, and the diving board body retracts. By means of the diving board, when doing sports, a user is protected against the collision injury, the diving board is beneficial to efficient training or competition, and the operation cost is saved.