When hardware-implemented SEC-DED（single error correcting

double error detecting） code is used for protecting memory

its capability of correction is limited.In order to improve the capability of correction

this paper proposes an EDAC（error detection and correction） coding method with software/hardware cooperation.Based on hardware-implemented SEC-DED coding for each horizontal word

this method makes software-implemented parity coding for the vertical bit-slice

and corrects bit-flip errors of memory through software/hardware cooperation.In comparison with the hardware-only EDAC method

the proposed method can correct more bit-flip errors without increasing hardware cost.Theoretic analyses and experimental results show that

the reliability of the memory protected by the software/hardware cooperation method is higher than the reliability of memory protected by the hardware-only method to some extent.