The invention provides a DVD player provided with a karaoke device, which comprises a circuit board. The circuit board comprises a microphone signal input port which is connected with an operation amplification unit; the operation amplification unit is connected with a simulation and digital signal processor which is connected with a double-circuit operation amplifier; the double-circuit operation amplifier outputs signal into a signal output port; a power supply board supplies power to the operation amplification unit and the double-circuit operation amplifier through a filtering unit; the power supply board supplies power to the simulation and digital signal processor through a steady voltage filtering circuit; and a first noise reduction processing unit is connected in series between the microphone signal input port and the operation amplification unit. As the noise reduction processing unit serves to reduce noise at the part which intends to produce a great amount of noise, the purpose of improving the output sound quality of the DVD player is achieved.