There are differenton-line measurements for boron concentration in domestic PWR NPPs, such as neutron absorption,titration and density etc.The principles of measurement of boron concentration as well as the application and maintenance of relevant on-line boron analyzer in domestic PWR NPPs are described.The comparison for both advantage and disadvantage of the different on-line boron analyzers are also made in this paper.It can offer a reference for the on-line boron analyzers in model selection, operation, repair and main-tenance as well as improvement of utilization.%国内压水堆核电站在线硼浓度计使用方法有中子吸收法、滴定法和密度法等。文章介绍了在线硼浓度计的测量原理，及其相应的在线监测硼浓度分析仪在国内压水堆核电站实际应用和维护情况，并分析比较了这几类硼浓度计的优缺点。为核电站在线硼浓度计的选型、使用、检修、维护以及提高在线仪表的可用率提供参考。
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