The NWA 11288 is a new basaltic shergottite found in 2015 with a typical subophitic texture, mainly composed of pyroxene (68. 6% in area) and maskelynite (28. 1% in area) with accessory phosphate (1. 35% in area), opaque minerals (1. 45% in area), and silica. Petrographic feature, mineralogy and shock metamorphism of the NWA 11288 were studied by scanning electron microscopy (SEM), electron probe (EPMA), and Raman spectroscopy. Based on the Ti/Al ratios of pyroxene cores, we estimate that the pressure and depth when the pigeonite cores formed are about 930 MPa and 50 km, respectively, corresponding to the boundary of the Martian crust and mantle.The NWA 11288 has undergone strong shock metamorphism supported by maskelynization of plagioclase, formation of shock induced melt veins and pockets, recrystallization of pyroxene in shock- induced melt areas, and the presence of high pressure polymorph of silica, coesite, in the shock- induced melt region. A new occurrence of coesite was identified in this study: aggregates of coesite, quartz, and silica glass were identified in the shock- induced melt pockets. The coesite and quartz mainly locate at the rim of the aggregates with silica glass in the central area, indicating that coesite recrystallized from silica melt during decompression, and some coesite partially transformed to quartz before quenching of silica glass. In addition, we also identified abundant acicular silica glass in shock- induced melt pockets and a typical stishovite/seifertite texture of silica grain in the interstitial area. These shock metamorphism features suggest that the impact peak pressure and temperature may reach up to 15~20 GPa and 1600℃, respectively. By comparing the petrography, mineral chemistry, and shock metamorphism features of the NWA 11288 and the NWA 8657/8656, we propose that the NWA 11288 is likely paired with the NWA 8657/8656.