The present invention discloses a dynamic stability analytical method and apparatus of a metro vehicle door system. Three-dimensional pose information of a dynamic target point generated by laser projection is resolved based on a binocular vision measurement system. The target point is formed by intersecting a laser light bar projected by a linear array laser and a vertical adhesive tape on a metro train door. Coordinates of the target point in an image are extracted by using an image processing algorithm, and three-dimensional reconstruction of the target point is implemented according to theimage coordinates. Processing results of different moments are adjusted and analyzed, dynamic operation status analysis of the vehicle door system is implemented, and dynamic detection of the vehicledoor system is completed. The present invention is high in measurement precision, strong in portability and high in reliability, effectively resolves on-line dynamic analysis of the metro vehicle door system in an operation stable state, and has important significance for metro safe operation and life and property security of passengers.