The present invention provides an intelligent power supply and distribution system, which comprises a power distribution module, a direct current power supply module, a busbar, a controller module and a liquid crystal display. The power distribution module comprises a main power supply unit and multiple power distribution units, each power distribution unit comprises a control circuit located at the upper layer and a power distribution component located at the lower layer, and a shielding partition is arranged between the control circuit and the power distribution component; the direct current power supply module is used for supplying power for each power distribution unit by the direct current power supply; the multiple power distribution units are connected with pieces of electric equipment in a square cabin and a compartment vehicle through electric connectors on the upper side of a power distribution box; and the controller module and the liquid crystal display are connected with the power distribution module. According to the invention, the running state of the electric equipment in the square cabin and the compartment vehicle is monitored and controlled on the basis of the modular and standardized design, and the intelligent power supply and distribution system has the advantages of stable and reliable power supply, simple operation in application method, convenience in maintenance and repair, quick fault diagnosis and good communication performance.