Aiming at interference of high frequency signals in harsh environments and failures caused by package, design a high-g MEMS acceleration sensor which has high reliability by means of encapsulation. According to sensor packaging technology, use ANSYS software to establish finite element models,simulate and analyze structure and encapsulation techniques for sensor performance. The results show that encapsulation technology can improve overload capacity and sensitivity,that is to say,a relatively high elastic modulus and low density of the pouring sealant can be effective for the high-overload-resistance ability and high sensitivity of a MEMS high-g accelerometer.%针对恶劣环境下高频信号的干扰与由封装引起的结构失效，设计了一种MEMS高g加速度传感器，通过灌封实现机械滤波，保证封装的可靠性。根据传感器封装工艺，利用ANSYS软件建立有限元模型，仿真分析了灌封技术对传感器结构和性能。结果表明：灌封技术可提高传感器的高过载能力和输出灵敏度，灌封弹性模量相对较大、密度相对较小的灌封胶可提高传感器的高过载能力和灵敏度。
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