The invention belongs to the technical field of power equipment, and particularly relates to an on-site relay protection device assembly line detection device. The on-site relay protection device assembly line detection device comprises an assembly line platform, a main standardized interface, an auxiliary standardized interface, an Ethernet switch and a console, wherein an inner bin is integrallyformed and connected inside the assembly line platform. According to the on-site relay protection device assembly line detection device, through the combination of accessories, the on-site relay protection device assembly line detection system solves the problems of large detection workload, complex wiring, large human factor influence and the like of a relay protection device in the prior art. The system has the functions of automatically identifying information of a detected device, realizing automatic positioning and automatic interface butt joint through a standardized structure of the detected device, automatically connecting the detected device into the detection system, then completing configuration downloading and full-function project detection through a closed loop of the detection system, automatically forming a detection report, reducing human intervention to the maximum extent and realizing standardization.