从导波光学的角度介绍了光纤化学传感器的工作原理，并分别介绍各类型化学传感器的特点及其应用．近年来，纤维光学技术迅速地深入到分析化学的许多领域，越来越引起人们的注意，出现了以光纤为传输线的探头式化学传感器．已经报道的光纤化学传感器种类很多．本文以有代表性的例子来说明它们的工作原理和优点． The working principle of optical fiber chemical sensors is introduced from the perspective of guided wave optics. The characteristics and applications of various types of chemical sensors are introduced respectively. In recent years, fiber optics technology has rapidly penetrated into many fields of analytical chemistry and attracted more and more attention. A probe-type chemical sensor based on optical fiber has appeared. Fiber-optic chemical sensors have been reported in many different types. This article uses representative examples to illustrate their working principles and advantages.