Automatic stretching extending base

The utility model discloses a self-extended expansion base, which comprises a main body of the expansion base, a force application mechanism, an extension section and a control mechanism. The extension section comprises an extension slot and a barrier component. The force application mechanism is connected between the main body base of the expansion base and the extension slot, exerting a force on the extension slot along the extension direction. Being multi-segment structured, the barrier component is connected with the extension slot. A second end of the control mechanism butts against the barrier component to prevent the extension slot from extending and ejecting out. When a first end of the control mechanism is pushed to move, the second end of the control mechanism changes the position at which the second end of the control mechanism contacts the barrier component, so that receiving the force exerted by the force application mechanism, the barrier component and the extension slot move along the extension direction.