A securing unit and a base seat securing structure. The base seat securing structure includes a base seat and multiple securing units. The base seat has a top side, a bottom side, multiple perforations and multiple securing holes formed through the base seat between the top side and the bottom side. The securing holes are positioned around the perforations. Each securing unit has a seat section disposed on the top side of the base seat and multiple connection sections. The seat section has a bore in communication with and corresponding to the perforation. The connection sections are disposed under a lower side of the seat section. One end of each connection section has one or multiple stopper end sections. The stopper end sections are passed through the corresponding securing holes to abut against the bottom side of the base seat.