LongRoPE is a technology released by Microsoft that can extend the context window of pre-trained large language models (LLMs) to 2048k (2 million) tokens. It enables the expansion from short contexts to long contexts, reducing training costs and time while maintaining the performance of the original short context window. It is applicable to improving the language model's understanding and generation capabilities in long texts, enhancing tasks such as machine reading comprehension, text summarization, and long article generation.