After investigation to understand that the use of the inland area is much lower than abroad, the market is in its infancy. With the advance of grading diagnosis and treatment and the improvement of the consciousness of hospital security, the disposable safety drainage device will enter a capacity space of one year and over a hundred million. (also known as the replacement of the operation room products - traditional glass bottles or plastic bottles) incomplete statistics of China's annual two and above the hospital's surgery for 30 million cases. It is not difficult to see, two a and above hospital every year in the form of increasing, the demand for waste liquid bag also increased in invisible.