Low-cost high-speed communication bus and transmission control method thereof

The invention discloses a low-cost high-speed communication bus which comprises master control equipment and slave equipment. The master control equipment is connected with the slave equipment throughserial data transmission buses. There are two serial data transmission buses, one serial data transmission bus is used for transmitting an instruction sent by the master control equipment to the slave equipment, and the other serial data transmission bus is used for transmitting response data sent by the slave equipment to the master control equipment; the master control equipment and the slave equipment respectively comprise a core micro-control unit, and the core micro-control units are connected with two RS485 controllers to achieve full duplex data receiving and transmitting. A special high-speed communication chip does not need to be adopted in the equipment, high-speed communication can be achieved by expanding an RS485 controller on the original basis of most existing equipment, and the transformation cost