The present invention discloses a structure for connecting a dust collecting hose of a central vacuum cleaning system, which is capable of connecting a dust collecting hose and a collecting pipe, without opening a closed plate by hand. The structure for connecting a dust collecting hose of a central vacuum cleaning system has a base plate. The base plate comprises a dust collecting pipe and a closed pipe. The dust collecting pipe is connected to a vacuum cleaning system. The closed plate is connected to one end of the dust collecting pipe at its rear end. An installation groove pivotally is formed at the front surface of the closed plate. The closed plate is rotationally installation at the installed in the base plate disposed groove in order to open the dust collecting pipe. A connecting plate is connected to a dust collecting hose at its rear end.