The utility model provides a novel variable sloping gap formula concrete drain tile, includes that concrete drain tile, end agree with cross -section interface, stagnant water rubber circle, road curb and water concrete leveling layer after and, it is prefabricated that the concrete drain tile is the single section, and every section end adopts that agree with the cross -section interface and stagnant water rubber circle is connected, the concrete drain tile slope sets up, waters concrete leveling layer after the nose increases, the utility model discloses combine concrete drain tile and escape canal to reform transform and combine with road curbstone, adopt whole prefabricated mode preparation to improve drainage efficiency and efficiency of construction, water concrete leveling layer after gap formula concrete drain tile nose increases, can lead to and pour the adjustment of partial thickness after to, thereby reach the requirement on variable slope.