Abstract: In September 2017, Changting seismic station installed VP broadband tiltmeter. From its operation in recent years, the instrument has a high degree of automation and observation accuracy, which can provide more reliable observation data for earthquake analysis and forecast. However, its stability is poor. The output zero drift of VP broadband tiltmeter is serious, which often need to zero. Although the automatic zero device has been added, which can achieve remote zero function through the network to avoid interference with the instrument due to personnel entering the hole, the zero module often failure including motor overload, chip burn out. In this paper, the common faults of the VP broadband tiltmeter in daily observation were analyzed to seek solutions to instrument failure, and summarize the VP broadband tiltmeter daily maintenance. We can quickly determine the cause of the instrument failure, timely complete the instrument maintenance, ensure continuous and reliable data in the future similar problems in the observation process.