The invention discloses an augmented reality shielding method based on image segmentation and the customized layer method. The method mainly comprises steps of acquiring prior knowledge, self-defining a space position relation of each layer in a scene according to the acquired prior knowledge and carrying out corresponding content filling; extracting a true shielding object; and carrying out shielding rendering. According to the invention, the defect of quite poor timeliness of a shielding method of depth calculation in an operation process in the prior art can be overcome; the defect that three-dimensional modeling and coverage completion of true objects are mainly achieved depending on manual setting of markers in a model reconstruction-based shielding method due to the high difficulty are overcome; and it is achieved that difficulty in effectively separating a background in a real scene from a to-be-shielded foreground target is reduced and the method is characterized by the separation accuracy.