Building ground flatness control method

The invention discloses a building ground flatness control method, and relates to the technical field of building construction. The floor flatness control method comprises the following specific operation steps that firstly, typesetting is conducted on a structural concrete slab according to the size of a partition seam designed in a drawing, then partition seam position lines are popped up through ink lines, and after the partition seam position lines are popped up, 50 * 50 mm cement mortar shot points are arranged at the intersection points of the ink lines; the cement mortar shot point height is set according to the fine aggregate concrete elevation required by a construction drawing. According to the floor flatness control method, after typesetting is conducted on a structural concrete slab according to the size of a separation seam, separation seam position lines are popped up through ink lines, 50 * 50 mm cement mortar shot points are arranged at the intersection points of the ink lines after the separa