The utility model relates to a photovoltaic power station low voltage ride through operation compatible type rapid contact line failure isolation device, and pertains to the field of new energy grid-connected power generation. According to the device, the photovoltaic power station grid-connected distributing substation side is provided with a two section type current protection element and an opposite end straight jumping protection element, wherein the two section type current protection element is used to determine whether a failure is an internal failure according to the measured current value after the failure, and if the failure is an internal failure, then export tripping is performed, and a tripping signal is sent to the photovoltaic power station side protection through the opposite end straight jumping protection element at the same time. The photovoltaic power station side is provided with a low voltage harmonic distortion rate rapid failure starting element and a straight jumping protection element, wherein the low voltage harmonic distortion rate rapid failure starting element is used to determine whether to open the export circuit of the protection device after the failure occurs, and the straight jumping protection element is used to accept the tripping signal sent from the opposite end protection to perform the export tripping. The device of the utility model can be used to realize photovoltaic power station contact line failure rapid detection and isolation to achieve effective compatibility between the photovoltaic power station anti-island protection and the low voltage ride through operation under the premise of effectively ensuring the low voltage ride through requirements of a power system.