经对３８组调查数据的统计分析，提出了一种三级和二种四级茶橙瘿螨分级调查方法。三种方法算出的螨情指数与实测螨口密度呈极显著的正相关。两种四级法的螨情指数转换成螨口密度，与实测螨口密度相符或基本相符，达到与六级法同等符合水平。三、四级调查方法的优点是，比六级法省力、省工，有利于提高螨口记数的准确性，螨情指数的计算方法也较简便。 Based on the statistic analysis of the 38 groups of survey data, a method of grading investigation on three grades and two grades of four grades of orange scabies was proposed. The mite index calculated by the three methods had a very significant positive correlation with the measured mite mouth density. Two kinds of four law mite intelligence index converted to mite mouth density, mites mouth density with the measured line or basically consistent with the six-level law to achieve the same level of compliance. The advantage of the third and fourth level survey methods is that it is more labor-saving and labor-saving than the six-level method, which is beneficial to improve the accuracy of mite mouth counting, and the calculation method of mite index is relatively simple.