Duct piece measuring component, duct piece measuring system and measuring method of duct piece measuring system

The invention discloses a duct piece measuring component, a duct piece measuring system and a measuring method thereof, and relates to the field of shield forming duct piece measurement. The component body comprises a straight section, supporting sections are connected to the two ends of the straight section respectively, the upper ends of the two supporting sections are connected with the end of the straight section, and the lower ends of the two supporting sections incline in the direction away from each other. The two supporting sections are the same in length, and the included angles between the two supporting sections and the straight section are the same. The connecting points between the two supporting sections and the straight section and the lower end points of the two supporting sections are located in the same horizontal plane. By the adoption of the scheme, the length is obviously shortened through the duct piece measuring component in a specific shape, moving in a narrow tunnel is facilitated, an