Abstract: With an attempt to find a suitable method for cleaning the water needle plate,the paper made a general introduction of the water needle plate,analyzed the chief materials which would cause blocking up of the needle plate and three forms of blocking up,and presented three kinds of representative chemical cleaning solution and suitable chemical regents.The cleaning mechanism of the high-pressure water cleaning technology for the water needle plate was elaborated as well as its method and advantages.Ultrasonic and laser cleaning technologies for it were also discussed.