Abstract: The investigation and handling of a major oil tanker explosion and burning accident is introduced, which involves the short-term continuous explosion and burning of oil tanks, and all the operators on the site died on the spot, and it is difficult to decide the initial explosion point and ignition source. Through on-site investigation, inspection appraisal, video analysis, expert demonstration and other means, the initial oil tank and ignition source of the explosion accident were successfully identified by using comprehensive methods such as analysis, reasoning and detection. At the same time, the technical characteristics of the ship fire and explosion accident investigation are summarized, and work suggestions on the fire investigator as an expert to attend the trial are put forward.

Key words: oil tanker explosion, fire investigation, on-site investigation, expert testimony