The　robustness　of　sampling　scheme　ensures　that　the　exact　samples　are　not　crucial　to　recover　the　signal　under　considered　and　some　errors　can　be　tolerated.　This　paper　addresses　that　two　kinds　of　nonuniform　average　sampling　schemes　are　robust　for　finitely　generated　shift-invariant　signals　in　mixed　Lebesgue　spaces.　The　results　show　that　the　mixed　shift-invariant　signals　can　be　reconstructed　stably　from　two　classes　of　nonuniform　average　samples,　respectively,　when　the　generators　and　sampling　functionals　are　disturbed　slightly.