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We demonstrate two self-injection locking extended cavity diode lasers (ECDLs) using resonant optical feedback independently from s- and p-polarizations of a monolithic folded Fabry Perot confocal cavity (MFC).The relative frequency shift of adjacent axial modes of s resonance and p resonance of MFC is around 1.030 GHz.Beat note measurements between the two ECDLs are performed and present a relative linewidth of 4kHz.With the help ofa narrow-linewidth reference laser,the linewidth of s-component and p-component ECDLs are measured to be abou t 32 kHz and 40 kHz,respectively.Diode lasers with narrow linewidth have been used in many fields,such as coherent communications,laser cooling and high-resolution spectroscopy.