Distributed wave recording system integrated with small-current grounding line selection function

The invention relates to a distributed wave recording system integrated with a small-current grounding line selection function, and the system comprises a management machine, wherein a signal input end of the management machine is connected with a plurality of collection terminals, and a signal output end of the management machine is connected with a display screen; wherein each collection terminal comprises a mutual inductor for acquiring analog quantity signals, a first optical coupling circuit for acquiring switching value signals, a first B code interface for acquiring electric B code signals and a first power supply module. An SFP interface is connected to the management machine, and a first relay is connected with a first alarm. The management machine comprises an optical receiving module for receiving signals acquired by the collection terminals, a second optical coupling circuit for acquiring switching value signals, a second B code interface for acquiring photoelectric B codes, a second AD conversion