The invention discloses an LED fluorescent tube with a modified structure. The LED fluorescent tube comprises a lamp tube base, and a plastic housing, a PCB board, an LED illuminant and an end cover which are arranged on the lamp tube base, wherein at least one bridge rectifier and at least one resistor are arranged on the surface of at least one end of the PCB board, at least one capacitor is arranged on the surface of the other end, at least one resistor or constant current diode which is connected with two conductive pins of the capacitor in parallel is arranged between the two conductive pins of the capacitor, the bridge rectifier and the resistor are arranged between an LED on the tail end and the end face of a PCB, the capacitor and the resistor or the constant current diode are arranged between the LED on the other end of the surface of the PCB board and the end face of the PCB, the anodes and the cathodes of the two conductive pins of the capacitor are respectively electrically connected with conductive circuit layers which are arranged on two sides of the LED along a longitudinal direction and are provided with anodes and cathodes, and a plurality of LED lamp string groups are arranged between the conductive circuit layers provided with the anodes and the cathodes. The LED fluorescent tube has the advantages of low cost, high efficiency, safety, long service life, convenience for maintenance and low cost.