With advances in computer and IoT technology, the realization of the Internet of Everything is just around the corner. Synchronous serial bus communication with simple, high-speed interfaces and easy implementation will become a key player in the electronics industry. However, due to factors such as I/O resources, timing constraints, and register resources, general microcontrollers have various problems. The serial bus communication of I/O simulation has a low transmission rate and cannot achieve true full duplex communication. SPI is a standard for serial transmission introduced by Motorola in the United States. It is a high-speed, full-duplex, synchronous communication bus. Peripheral chips with SPI interface are abundant and widely used. This design uses Verilog HDL language to describe the function, based on the FPGA platform, verifies the SPI serial communication protocol, and realizes the serial communication between the sender and the receiver. SPI has important research significance for enhancing the stability of inter-device communication, improving communication speed and transmission security in the future.