This　article　is　concerned　with　the　exponential　stability　and　l(1)-gain　performance　analysis　of　discrete-time　switched　positive　systems　(DTSPSs)　under　mode-dependent　average　dwell　time　(MDADT)　switching.　A　novel　linear　copositive　Lyapunov　function,　which　is　both　quasi-time-dependent　and　mode-dependent,　is　designed　for　the　stability　and　performance　analysis.　Stability　conditions　are　developed　such　that　the　considered　DTSPS　is　exponentially　stable　and　also　attains　an　attenuation　performance.　The　solved　conditions　for　the　controllers　design　are　presented　in　terms　of　linear　programming　(LP),　and　are　both　quasi-time-dependent　and　mode-dependent.　Two　examples　are　organized　to　validate　the　effectiveness　of　the　proposed　scheme　finally.