This study is a prospective, single-center, randomized controlled trial focusing on patients with acute necrotizing pancreatitis (ANP) complicated by pancreatic sinistral portal hypertension (PSPH). A total of 66 participants are planned to be enrolled. The study aims to compare the outcomes of two surgical approaches: open debridement combined with distal pancreatectomy and total splenectomy versus open debridementalone. The objective is to observe the impact of total splenectomy on the debridement efficacy, perioperative recovery, and prognosis of patients with ANP complicated by PSPH. The primary observational indicators include postoperative length of hospital stay, postoperative cost, postoperative life quality, and the alleviation of PSPH. Secondary observational indicators encompass the number of unplanned reoperations, postoperative infection control, postoperative irrigation volume, postoperative antibiotic consumption, and postoperative platelet count change. The study will be carried out in accordance with the protocol.