This airtight door, specifically designed for ICU monitoring rooms, meets the requirements of high cleanliness, high airtightness, and quiet operation. Medical-grade airtight sealing strips are embedded around the door, ensuring a tight seal with the frame when closed, effectively isolating airflow, dust, and microorganisms, and ensuring a stable pressure difference between the nursing unit and the corridor. It employs a silent drive system and intelligent control, supporting multiple methods including induction, remote control, foot kick, button, and interlocking. Operation is smooth and quiet, and it features obstacle detection rebound and anti-pinch safety protection functions. The door surface is coated with an antibacterial coating or made of stainless steel, making it easy to clean and corrosion-resistant. The viewing window can be equipped with radiation-proof or explosion-proof glass.