According to the current development of photovoltaic industry and the relevant provisions of the standards for PV power station connected to power grid in recent years, a testing platform to detect the ability of anti-islanding is developed and designed. The mobile an-islanding detection platform can be accessed to a set of multi-voltage, such as 380 V, 10 kV, 35 kV, with the maximum capacity of PV power station being 1.5 MW, considering the capacity of the inverter, power grid’s voltage level, load loaded, geographical environment and so on. Field tests have been conducted successfully on a PV power station in Quyang. The results show that whether the inverter connected to power grid owes the ability of an-islanding can be detected quickly and accurately by the test platform.