Disclosed is a pipeline suspension inspecting gauge which comprises a mobile carrier and a power supply module, a primary controller, a positioning module, a vibration sensor, a variable-frequency excitation device, a secondary controller, and a data processing assembly which are arranged on the mobile carrier. The power supply module, the positioning module, and the secondary controller are all electrically connected with the primary controller; the variable-frequency vibration excitation device, the vibration sensor, and the data processing assembly are all electrically connected with the secondary controller. The pipeline suspension inspecting gauge is simple in structure and high in measurement sensitivity.