二次根式的化简求值是中学数学中培养学生计算能力的重要内容.一般来说,化简二次根式运算都比较繁复,而且没有固定的解题模式.但是只要认真审题,针对题目类型,找出形式和数量上的特点,选用恰当的化简技巧,就能达到化繁为简、化难为易的目的.现归纳化简二次根式的几种解法,供参考. The secondary root-based simplification evaluation is an important part of cultivating students’ computational ability in middle school mathematics. In general, simplifying secondary root-based operations is more complicated and there is no fixed problem-solving mode. However, as long as the questions are carefully examined, the types of questions should be considered. In order to find out the features of form and quantity, and to use appropriate simplification techniques, we can achieve the goal of simplifying and simplifying and making things difficult and easy. We will now summarize several solutions to simplify the secondary root formula for reference.