解温度41.88℃、pH值4.61、时间160min。 The cell wall of Jew's ear is broken by the cellulase enzymatic hydrolysis with ultrasonic technology after processed by super micro-mill, which makes its polysaccharide goes through the broken cell into hydrolytic liquid, as a result, more Jew's ear polysaccharide will be gained. The parameters of the experiment were optimized by the experimental design method and a regress equation on temperature, pH and Jew's ear polysaccharide dissolving rate was developed by statistic analysis of the quadratic general rotary design. The optimized parameters of Jew's ear polysaccharide extraction by the cellulase enzymatic hydrolysis with ultrasonic technologies were obtained, which are ultrasonic frequency of 20kHz, ultrasonic power of 20W, enzymatic hydrolysis temperature of 41.88℃, pH4.61 and processing time of 160min.