The invention discloses a simulation early warning platform and monitoring system for dark spots on an electric transmission line. The simulation early warning platform and monitoring system for the dark spots on the electric transmission line consists of a ledger data management module, a report import and export module, a dark spot monitoring functional module, a mobile phone map navigation module, a vehicle-mounted map navigation module and a polling vehicle positioning and monitoring module. According to the simulation early warning platform and monitoring system for the dark spots on the electric transmission line disclosed by the invention, line polling personnel can conveniently register discovered conditions of the dark spots on the line in the platform in time, and early warning information is set, and thus, managers at different levels can conveniently monitor development situations of the dark spots on the line, and therefore, the work efficiency of grass-roots staffs is greatly improved, and the work cost is effectively reduced. By establishing a map scene display platform, objects, such as the electric transmission line, the dark spots and the like, are graphically displayed, so that monitoring personnel can more visually know the condition of the electric transmission line and the distribution situation of the dark spots, and therefore, potential dangerous factors on the electric transmission line are effectively prevented, the safety and the reliability of the line are ensured, and the power distribution reliability of power enterprises is improved.