The invention discloses a GIS equipment 3D animation fault diagnosis method. The method comprises the steps that structure and fault diagnosis of GIS equipment is innovatively changed from an invisible, hidden and black-box diagnosis mode to a visible, graphical, animation and white-box mode by the adoption of a detection instrument manufactured through an analog-digital conversion technology and an sql database system developed by Microsoft, whether the GIS equipment has a fault in the operating state is answered in the mode of logic progression through combination of data and graphic definitions, and if the GIS equipment has a fault, the type, degree and development trend of the fault are further answered. Through the method, limitations existing in traditional methods are avoided, and the problems that diagnosis cannot be accurately and timely made in a fault latency period of SF6 power transformation primary equipment, measures cannot be taken as soon as possible, and electrical equipment faults cannot be prevented are avoided.