Corrugated board and corrugated board module

A corrugated board module comprises a first corrugated board and a second corrugated board. The first corrugated board has a first board body and a rib. The first board body has a top surface and a bottom surface that are opposite to each other, a first lateral side connection surface connected to one side of the top and bottom surfaces, and a concave part inwardly recessed in the top surface and close to the first lateral side connection surface and extending along the first lateral side connection surface. The concaved part can receive a head part of a fixing element penetrating through the first board body. The rib projects from the top surface and is close to the concave part and extends along the first lateral side connection surface. The second board is coupled to the first board and comprises a second board body and a blocking eaves. The second board body has a second lateral side connection surface jointed to the first lateral side connection surface. The blocking eaves projects from the second latera