The utility model discloses a probe of an average-speed pipe flowmeter. The probe comprises a probe rod and a connecting plate which is arranged on the probe rod and used for connecting a detecting instrument. The probe rod is provided with a high-pressure cavity, a low-pressure cavity, a high-pressure measuring hole and a low-pressure measuring hole. The connecting plate is provided with a high-pressure tapping hole and a low-pressure taping hole communicated with the high-pressure cavity and the low-pressure cavity respectively. The probe further comprises a temperature head sleeve for containing a temperature measuring component, and an installation cover which is arranged outside the probe rod in a sleeving mode and used for installing the temperature head sleeve. The connecting plate is provided with a temperature measuring hole communicated with an inner cavity of the installation cover. According to the probe of the average-speed pipe flowmeter, the temperature head sleeve containing the temperature measuring component is arranged in the installation cover, the installation cover extends into a pipeline to be measured along with the probe rod, the measuring instrument connected with the connecting plate can receive the pressure and temperature information of a medium, flow measuring is achieved, the temperature measuring can be achieved, and field installing and measuring are easier and more convenient.