The invention includes a monitoring device for a permanent magnet pole of a permanent magnet motor. The permanent magnet pole includes multilayer magnetic steel with same magnetic properties in the axial direction of the wall surface of a magnet yoke and a protective coating layer coating the multilayer magnetic steel; the magnetic steel is tightly fixed on the inner wall of the magnet yoke through a press strip; the monitoring device includes a first detection assembly, a piezoelectric film and a memorizer, wherein the first detection assembly is used for detecting the running state of the protective coating layer during the running process of the permanent magnet pole, the piezoelectric film is arranged between the press strip and the protective coating layer, a temperature-sensing element is encapsulated in the piezoelectric film, and the memorizer is used for detecting the detection signals of the first detection assembly. The monitoring device can detect the running state of the protective coating layer and store related test data, therefore, the fixed state of the magnetic steel can be obtained according to the state of the protective coating layer, and a data support is provided for the fixation of the magnetic steel and the evaluation and improvement of the reliability of the protective coating layer. Moreover, the invention further provides a press strip of the permanent magnet pole.