A kind of pendulous high-g micro-machined accelerometer is designed. Cruciform torsion beam is applied to reduce cross-axis sensitivity, and comb structure is used as stop and damper. The micro-structure parallels 6 sensing units to improve initial capacitance. Based on finite analysis, the micro-structure’s natural frequency is about 56 kHz with modal separation ratio more than 4. It could resist 1E5 g shock acceleration and the micro-structure’s sensitivity is 8.94E-6pF/g. The accelerometer’s fabricated by SOG technology, and its single-side initial capacitance is about 3.6pF. Measurement bandwidth of ring diode capacitance detection circuit is analyzed and high g accelerometer’s detection circuit is designed. Calibrated by Hopkinson bar, the accelerometer’s nonlinearity is 2% of 2E4 g range, and scale factor is about 24.5μV/g with 5V supply.