The number and position of total pressure and back pressure detection holes in the averaging tube flowmeter, as well as the cross-sectional shape of the detection rod, were discussed. Several structural forms of the averaging tube were introduced in detail, and the calculation formula for using flow measurement was given. The influence of various factors on measurement accuracy was analyzed, and finally, a concept for the development of this product was proposed. Keywords: traffic measurement; Averaging tube; Influencing factors; The measuring element of the application of the averaging tube flowmeter - the averaging tube (also known as Annubar in foreign countries, directly translated as Anubar), is developed based on the early principle of pitot tube speed measurement. It is a new type of differential pressure flow measuring element developed in the late 1960s and began to be applied to industrial sites in China. In the mid-1970s, more than 30 manufacturers have developed and produced it. The advantages of the averaging tube are:; The structure is relatively simple, with low pressure loss, easy installation and disassembly, and minimal maintenance. Due to its low production cost and low price, this flowmeter is relatively popular in the market and occupies a place among many flow meters. Especially due to its low pressure loss (less than 5% compared to orifice plates), it greatly reduces power consumption, which has special significance in today's energy shortage. Due to its wide adaptability and good long-term stability, this flowmeter has made significant progress in recent years, resulting in several different structural forms of flowmeters. However, due to improper use, some problems have arisen in the application, which has caused a great contradiction between objective requirements and the current development status. Many people hope that its application problems can be solved. Therefore, people have made a lot of unremitting efforts, making the averaging tube flowmeter, which is both ancient and young, widely used in energy, environmental protection and other measurement tests.