On-line monitoring device for line state of automatic fire alarm system of project under construction

The utility model relates to a line state on-line monitoring device for an automatic fire alarm system of a project under construction. The line state on-line monitoring device comprises a plurality of line monitoring modules and a plurality of monitoring resistors R which are respectively matched with the plurality of line monitoring modules for use, the plurality of line monitoring modules are respectively connected to cable tail ends, close to a bus short circuit isolator, of branches of the automatic fire alarm system line, and the plurality of monitoring resistors R are respectively connected to cable tail ends, farthest from the bus short circuit isolator, of the branches of the automatic fire alarm system line. According to the utility model, the automatic fire alarm system can be monitored, recorded and alarmed from cable laying to equipment installation, so that the construction efficiency and quality are improved, and the construction cost is saved. 本实用新型涉及一种在建工程火灾自动报警系统线路状态在线监测装置，包括多个线路监测模块和分别与多个线路