In view of the current trend of connecting photovoltaic power stations to the power grid in China and according to the technical stipulations for grid connection of photovoltaic power stations， a small-scale mobile detection platform for the grid connection of photovoltaic power stations is developed. The utility voltage and frequency disturbance test， anti-islanding test， power output feature test， electric power quality test and general performance test can be made on the spot by the mobile detection platform. In light of the characteristics of distributed access to the grid of the photovoltaic power station， the detection platform designed is capable of flexible mobile performance. It is shown by the results of a field test on the platform-based photovoltaic power station that the detection platform can accomplish all of the testing contents.