GC-GIS system is a geochemical data processing system based on fractal theory． The system realized quantity statistics function by calling Surfer and MapInfo software，and it is compiled with Visual Basic language． This system is designed to integrate the functions both quantity statistics of Surfer and spatial data management of MapInfo． A new algorithm of fractal is added up to GC-GIS． Taking example for Weichang region of Hebei to test the system，the processing results show that the model can match the real distribution of mine well．