For developing the applications of PSS (position sensitive spectrometer), it combined with micro-synchrotron radiation light (μ-SRL) beam has analyzed some typical samples in order to research its energy resolution and detection limit. The energy resolution of 14.2 eV for Ti Kα line was obtained, Mn Kα and Cr Kβ lines, the energy separation of 47 eV, has clearly be resolved in a sample of stainless steel as well as absolute detection limit of Ti and Cu in thin samples reached 10-10g order of magnitude. Such results show that the applications of PSS have a bright prospect at SRL beam.