The invention discloses an electric vehicle electric system without a main wire harness, belongs to the field of electric vehicle control systems, and is designed in order to solve the problem that a traditional electric vehicle is low in vehicle assembling efficiency. According to the electric vehicle electric system without the main wire harness provided by the invention, the electric system is arranged on a electric vehicle body frame and vehicle wheels, and the electric system comprises a generation device, communication devices, an energy storage device and a control device. The generation device is arranged on front vehicle wheels of an electric vehicle, and is used for supplying a power supply for electric appliances of the electric vehicle; the communication devices comprise two parts, wherein the first communication device and the energy storage device are arranged in the front of the electric vehicle body frame, and the second communication device and the control device are arranged at the rear of the electric vehicle body frame. The electric system is arranged on the electric vehicle body frame and the vehicle wheels to replace a traditional mounting method of the main wire harness, so that the vehicle assembling efficiency and the system reliability are greatly improved, and meanwhile the purpose of reducing the cost is reached.