A connection conversion device of an intelligent terminal comprises a square shell, wherein an inlet wire connection interface and an outlet wire connection interface which correspond to each other are respectively arranged on two opposite side walls of the shell and are connected to each other in the square shell so that a corresponding connection mechanism is formed; an analog signal connection mechanism and a digital signal connection mechanism are arranged on the square shell at least; the analog signal connection mechanism is at least provided with two inlet wire connection interfaces and two outlet wire connection interfaces; the connection interfaces are flange type aviation male plugs respectively; an 8-core binding post is arranged in each plug; each inlet wire is connected with a corresponding outlet wire in a point-to-point mode; the digital signal connection mechanism at least comprises three inlet wire connection interfaces and three outlet wire connection interfaces; the inlet wire connection interfaces and the outlet wire connection interfaces are ST (system test) interfaces; and moreover, the inlet wire connection interfaces and the outlet wire connection interfaces are connected to each other in the square shell by multimode optical fibers. The connection conversion device of the intelligent terminal has the advantages that the connection conversion device is simple in structure and convenient and reliable to use; delayed learning time is shortened; the learning efficiency is improved; and learning materials can be saved.