Abstract: A flow dividing device for gardening pipes includes a main body having a plurality of mounting studs, and a plurality of water control switches each mounted on the respective mounting stud. Each of the water control switches includes a control valve, an operation knob, and a pipe connector. Thus, the water flow of each of the water control switches is opened and closed by rotation of the operation knob, thereby facilitating a user operating the water control switches. In addition, when the pipe connector is detached from the operation knob, the pipe connector is rotatable relative to the operation knob so that the pipe connector is freely rotatable with the gardening pipe to facilitate a user rotating the gardening pipe relative to the main body.