A floorboard connecting base and a floorboard connecting structure are disclosed in the application. The floorboard connecting base includes a base body, a convex part and a limiting part. The convex part is located at an end of an upper surface of the base body. The limiting part is located at the upper surface of the base body, and is spaced from the convex part to form an installation groove for inserting a floorboard unit, and a free end of the limiting part is bent in a direction towards the convex part to form a step block for limiting the floorboard unit. The floorboard connecting structure according to the disclosure is of a locking type, so it can be paved without glue due to a locking force, which is environment-friendly. A whole structure may extend all around with change of temperature, and there will be no uplift or cracking.

A floor panel (1) has interlocking means (10, 11) formed on the side of its short edges (5, 5) being joined together. These interlocking means (10, 11) comprise joining parts made as a male joining part (9) and a female joining part (12) and have a vertically active concave locking part (13) and a convex locking part (14), as well as slanted guiding surfaces (15, 16). Furthermore, there is a bendable part (7) formed in the lower surface (2a) of the floor panel (1), comprising a plurality of adjacent recesses (8, 8) formed in the lower surface (2a), next to the male joining part (9), which are inclined relative to the short edge (5) of the side surface (6), allowing the angular deflection of the male joining part (9) to be increased, relative to the horizontal plane, during its interlocking with the female joining part (12) at the short edges (5, 5).