Polarity test standard line of MPO connector and detection system

The invention discloses a polarity test standard line of an MPO connector and a detection system and relates to the technical field of connectors. The polarity test standard line is aligned with a to-be-detected MPO connector, the device is used for detecting polarity of the to-be-detected MPO connector. The polarity test standard line comprises a standard line body, a standard optical fiber insertion core and a standard optical fiber, wherein the standard optical fiber insertion core extends inwards from a first end surface of the standard line body, the standard optical fiber is arranged inthe standard optical fiber insertion core, the height of a connecting end of the standard optical fiber extending out of the first end surface is the height H of the standard optical fiber, the heightH of the standard optical fiber is a negative value, and the first end surface is configured to form an avoidance space with the MPO connector to be tested. The polarity test standard line of the MPOconnector is advantaged in