The invention belongs to the technical field of artificial rock core preparation, and in particular relates to a preparation method of an artificial rock core of jointing shale. The method comprises the following steps: mixing and stirring cement, quartz sand, clay and gypsum powder; adding a small amount of cereal and scraps of paper into the mixture, adding water into the mixture and stirring uniformly; casting the mixture in a layered manner to form a cement test sample; and coating lubricating oil between every two layers, and drying the cement test sample for molding, thereby obtaining the artificial rock core of the jointing shale. By the preparation method, the cement test sample with certain fracture development, bedding development and brittleness can be obtained, and the mechanical properties of a bedding plane (1), a natural fracture (2), a hydraulic fracture (3) and the like of the jointing shale rock can be simulated relatively accurately, so that shale oil and gas can be developed effectively. According to the preparation method, the used materials are simple, the cost is low, and the operation is simple and convenient.