1. A filtering type single eye window personal respiratory protective equipment that can effectively protect the wearer's face, eyes, and respiratory tract from damage caused by toxic agents, biological warfare agents, and radioactive dust. 2. (1) Anti toxic time: Anti cyanide time: ≥ 30 minutes. (30L/min, 1.5mg/L, relative humidity: 80-80%) (2) Inhalation resistance: ≤ 186Pa (30L/min). (3) Exhalation resistance: ≤ 300Pa (160L/min). (4) Field of view: Total field of view: ≥ 70%; Binocular field of view: ≥ 60%; View below: ≥ 40 °.