The multi-function gas component analyzer can simultaneously carry 6 different types of gas sensors to monitor the toxic and harmful gases in the scene in real time, and the 6 kinds of gas sensors can be replaced at any time according to the site requirements, so as to analyze the smoke toxicity of the fire field in depth. Auxiliary firefighting and rescue decision-making, providing guidance for personal protection of firefighters when entering the fire. At the same time, the collected real-time fire field data can enrich the fire site database and provide on-site information for the fire command.