The utility model relates to a distribution network physical simulation device, including obs core control module, man -machine interaction module, relay protection device, fault simulating device, data acquisition module and a plurality of mimic -disconnecting switch, the obs core control module is connected with man -machine interaction module, relay protection device, data acquisition module, fault simulating device and mimic -disconnecting switch electricity respectively. The utility model discloses can simulate multiple operating condition if refuse, the mistake is moved, shake etc. Alsocan simulate troubles such as common short circuit in the distribution network, ground connection, broken string.