Multi-lamp-tube driving circuit

A multi-lamp-tube driving circuit comprises a control module, a first transformer and a second transformer. The control module generates a first square signal and a second square signal and is provided with a feedback contact. The first transformer comprises a first main coil and an induction coil. The first main coil receives the first square signal. The induction coil corresponds to the first main coil and is coupled to the feedback contact. The second transformer comprises a second main coil. The second main coil is in series connection with the first main coil and receives the second square signal. The induction coil induces a feedback signal according to the first square signal of the first main coil, the control module adjusts the first square signal and the second square signal according to the feedback signal, thereby keeping the outputted square signals under a stable state and effectively controlling a lamp tube device to output light with fixed brightness. The multi-lamp-tube driving circuit resolv