A beverage supply device , comprising: a bracket comprising a supporting seat and an adapting seat , the adapting seat being rotatably fitted with the supporting seat about a shaft ; a liquid outlet mechanism controlled to turn on or turn off; a blocking member fitted with a mouth of a beverage container , the blocking member having a channel fitted with the liquid outlet mechanism, the blocking member being disposed on the adapting seat and rotating synchronously with the adapting seat about the shaft , the blocking member having an initially-assembled position and a fully-assembled position on a rotation path of the blocking member ; when the blocking member is located at the initially-assembled position, the beverage container is fitted to the blocking member in a state that the mouth of the beverage container is higher than a liquid level of the beverage; when the blocking member is located at the fully-assembled position, the beverage container is vertically inverted or obliquely inverted on the blocking member ; characterized in that the liquid outlet mechanism comprises a liquid outlet pipe and a liquid injection nozzle docked upstream of the liquid outlet pipe , the liquid injection nozzle being inserted in the channel in a first direction; the bracket further comprises a guide seat which is connected with the liquid injection nozzle and the supporting seat respectively, and the guide seat drives the liquid injection nozzle to move relative to the blocking member in the first direction when the blocking member moves from the initially-assembled position to the fully-assembled position. a bracket comprising a supporting seat and an adapting seat , the adapting seat being rotatably fitted with the supporting seat about a shaft ; a liquid outlet mechanism controlled to turn on or turn off; a blocking member fitted with a mouth of a beverage container , the blocking member having a channel fitted with the liquid outlet mechanism, the blocking member being disposed on the adapting seat and rotating synchronously with the adapting seat about the shaft , the blocking member having an initially-assembled position and a fully-assembled position on a rotation path of the blocking member ; when the blocking member is located at the initially-assembled position, the beverage container is fitted to the blocking member in a state that the mouth of the beverage container is higher than a liquid level of the beverage; when the blocking member is located at the fully-assembled position, the beverage container is vertically inverted or obliquely inverted on the blocking member ; characterized in that the liquid outlet mechanism comprises a liquid outlet pipe and a liquid injection nozzle docked upstream of the liquid outlet pipe , the liquid injection nozzle being inserted in the channel in a first direction; the bracket further comprises a guide seat which is connected with the liquid injection nozzle and the supporting seat respectively, and the guide seat drives the liquid injection nozzle to move relative to the blocking member in the first direction when the blocking member moves from the initially-assembled position to the fully-assembled position. <EOS>