器件的漏气率大小是决定红外探测器搁置和使用寿命的关键因素之一 ,也是判断军用多元金属杜瓦瓶真空完善性的重要指标 ,特别是常规漏率检测手段难以探测微小漏率是长久以来影响杜瓦瓶成品率的重要因素。文中简要介绍几种真空高灵敏度微小漏率测试方法、基本原理和测试结果 ,针对杜瓦瓶的气密性要求采用相应微小漏率测试手段 ,并在生产中获得应用。 The leakage rate of the device is one of the key factors that determine the shelving and service life of the infrared detector. It is also an important indicator to judge the vacuum integrity of the military multi-metal dew bottle, especially the conventional leak rate detection means is difficult to detect the micro-leak rate for a long time Since the impact of Dewar yield an important factor. In this paper, several kinds of vacuum sensitivity test method, basic principle and test results are briefly introduced. According to the leak test method of Dewar vacuum bottle, it is applied in production.