The invention relates to a monitoring device for the tilting of a power tower and solves the problem that the monitoring and the adjustment are not easily realized after the power tower tilts. The monitoring device is characterized in that hydraulic pumps are buried at four support legs of the power tower; a three-axis acceleration sensor module is arranged on a horizontal platform of the center of the power tower; the hydraulic pumps are respectively connected to an oil tank; an electromagnetic valve is arranged on an oil way of the oil tank; the three-axis acceleration sensor module is connected to a CPU (Central Processing Unit) module; a GPRS (General Packet Radio Service) module is connected to the CPU module; the CPU module is also connected to the electromagnetic valve. The monitoring device disclosed by the invention has the advantages of simple structure, accurate judgment, reliable work, low possibility of misoperation and no limit from use environment. According to the monitoring device, the problem that labor force and material resources are consumed by artificial patrol is solved; particularly the destructive tilting can be reported in real time and an important monitoring action is realized.