A securing base includes a base seat unit and a clamp unit. The base seat unit includes a base seat formed with a receiving groove, and a securing plate secured to the base seat. The clamp unit includes a clamp member and a bolt member. The clamp member has an engaging segment disposed within the receiving groove, and a clamp segment disposed outside of the base seat unit. The bolt member extends drivingly through the engaging segment and extends rotatably into the securing plate. Rotation of the bolt member drives the clamp member to move along the bolt member, thereby moving the clamp segment to be distal from or proximate to the securing plate.