The invention discloses a timer attached to swimming goggles with displaying and voice broadcasting functions. The timer is attached to swimming goggles through a fixing band and comprises a control chip, a display screen, a button and an acceleration sensor. The display screen is connected with the control chip. By pressing the button on the timer for a long time to start or end timing operation, and by pressing the button on the timer, a user can check a previous recorded value and realize voice broadcasting. The acceleration sensor is used for sensing whether the movement direction of the human body suddenly changes and saving obtained time intervals in the control chip. By wearing the timer with real-time displaying and voice broadcasting functions, a swimmer can timely obtain precise time consumption of the previous one or more cycles without help from others, and data can be saved in electronic equipment in time so as to be checked later at any time.