The invention belongs to the technical field of tennis ball sports equipment, and particularly relates to a tennis ball serving device which comprises a ball serving machine and a controller. The controller is installed on the outer side of the ball serving machine, and the controller is used for controlling the device to operate automatically; the ball serving machine comprises a shell, a ball serving launching device, a lifting unit and a ball inlet channel, the upper end of the shell is a slope, one side of the shell is provided with the ball inlet channel, and the lifting unit is located inside the shell; the ball inlet channel is arranged obliquely, and the lower end of the ball inlet channel makes contact with the end of a stretchable cylinder; the lifting unit comprises a stretchable cylinder and a weight sensor; the lifting unit is used for pushing tennis balls in the ball inlet channel out of the shell; the ball serving launching device is located at the upper end face of theshell; table tennis are launched by means of elasticity of a rubber sheet, the tennis ball serving initial speed is increased, a rubber sheet is driven through the sliding shaft to slide in an arc shape, and therefore the tennis serving angle can be regulated and the tennis serving randomness can be enhanced, and the tennis training effect is improved.