The present disclosure discloses a color film substrate and a manufacturing method thereof, increase a translucent pattern with one layer has groove structure between the substrate and the color blocking pattern, and increase the contact area between the color blocking pattern and the translucent pattern through the groove structure, by means of the contact of the translucent pattern and the substrate, thereby increasing the contact area between the color blocking pattern and the substrate, it is possible to avoid the color blocking pattern peeling, to improve the quality of the product.