Abstract: It is an important means for fast and efficient generation of agricultural products traceability code by using the portable terminal device, which can ensure the reliability of traceability code, enhance the integrity of attribute information and improve the business efficiency. An encryption algorithm of agricultural products traceability code was designed and implemented on embedded platform based on the trace coding method with geographical coordinates and improved AES algorithm. Then, the storage space and speed of the encryption algorithm was calculated and evaluated based on LPC1766 microprocessor and Keil uVision3 software development environment, which can also give a reference to transplant this algorithm into the other embedded platforms. It ensured reliable and security traceability using terminal device owing to the feature of uniqueness and dynamic key of traceability code ciphertext. At last, an example of the application solution about the encryption algorithm on a label printing device for agricultural products tracing was introduced.