The embodiment of the invention provides a data acquisition device for water infiltration monitoring by a DC electric method. The data acquisition device is characterized by comprising a master control unit, a data acquisition unit breaking and closing and electrode selection module, a working electrode interface, selection switch module thereof and a DC power supply control module. In the data acquisition device, a front multi-core cable interface and a rear multi-core cable interface of the data acquisition unit breaking and closing and electrode selection module are connected with two grounding electrode arrays to form the data acquisition unit and are connected in parallel by a data communication line or a 4G/5G network data acquisition unit, two four-core cable interfaces of the dataacquisition unit breaking and closing and electrode selection module communicate with a working electrode of the data acquisition unit in parallel, arbitrary combination and separation of adjacent data acquisition unit is achieved, and the working electrode is randomly selected in a combination unit. The data acquisition device is key equipment for achieving long-distance, remote, unattended and high-efficiency monitoring and real-time early-warning on underground water transmission culvert, embankment and slope water infiltration.