Less is More: Knowledge-Aware Compression for Long Legal Judgment Prediction

Fanghao Lou, Qiqi Wang, Guanyu Chen, Senbo Zhang, Kaiqi Zhao, Qian Liu, Huijia Li


Abstract
Legal case facts are often lengthy, complex, and difficult to process, posing challenges for legal judgment prediction. Although recent advances leverage large language models (LLMs) for legal reasoning, they face high computational costs and information degradation when handling long cases. Previous approaches, such as architectural modifications and text compression methods, reduce computational complexity to some extent but still struggle to effectively capture legally salient information in complex cases. We propose a legal knowledge–adaptive compression framework for long legal judgment prediction that integrates domain-specific legal knowledge to guide adaptive context compression. Our approach selectively retains legally relevant information while reducing redundant or less informative content, enabling efficient and accurate long-context reasoning. We evaluate the proposed framework on four real-world datasets spanning multiple jurisdictions and languages. Experimental results demonstrate that our method outperforms existing approaches in both prediction performance and computational efficiency.
Anthology ID:
2026.findings-acl.1450
Volume:
Findings of the Association for Computational Linguistics: ACL 2026
Month:
July
Year:
2026
Address:
San Diego, California, United States
Editors:
Maria Liakata, Viviane P. Moreira, Jiajun Zhang, David Jurgens
Venue:
Findings
SIG:
Publisher:
Association for Computational Linguistics
Note:
Pages:
29015–29031
Language:
URL:
https://preview.aclanthology.org/ingest-acl/2026.findings-acl.1450/
DOI:
Bibkey:
Cite (ACL):
Fanghao Lou, Qiqi Wang, Guanyu Chen, Senbo Zhang, Kaiqi Zhao, Qian Liu, and Huijia Li. 2026. Less is More: Knowledge-Aware Compression for Long Legal Judgment Prediction. In Findings of the Association for Computational Linguistics: ACL 2026, pages 29015–29031, San Diego, California, United States. Association for Computational Linguistics.
Cite (Informal):
Less is More: Knowledge-Aware Compression for Long Legal Judgment Prediction (Lou et al., Findings 2026)
Copy Citation:
PDF:
https://preview.aclanthology.org/ingest-acl/2026.findings-acl.1450.pdf
Checklist:
 2026.findings-acl.1450.checklist.pdf