A combined supporting base includes a base body, a fixing device, an elasticity device and a supporting frame having a hook. The base body has a first through hole, while the fixing device has a second through hole. The fixing device is rotatably disposed within the base body. The elasticity device is disposed between the base body and the fixing device. The supporting frame is coupled with the fixing device by inserting the hook into the first through hole to drive the fixing device or separated from the fixing device by rotating the fixing device to withdraw the hook from the first through hole.
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