The 1970 Australian Sports Car Championship was a CAMS sanctioned national motor racing title for drivers of Group A Sports Cars, Group B Improved Production Sports Cars and Group D Series Production Sports Cars. The championship, which was the second Australian Sports Car Championship, was contested over a three heats series with one race per heat.
Championship points were awarded on a 9-6-4-3-2-1 basis to the first six placegetters at each heat.