Hazardous waste incineration fly ash collecting device

The utility model discloses a hazardous waste incineration fly ash collecting device which comprises a collecting box body, a cover plate is arranged above the collecting box body, an ash falling opening and an observation opening are formed in the cover plate, the ash falling opening is connected with a base, an ash discharging valve is connected to the upper portion of the base, a groove is formed in the ash falling opening, a sealing rubber pad is arranged in the groove, and the sealing rubber pad is connected with the observation opening. The groove is connected with the base through a sealing through hole, and a sliding plate with a handle is arranged on the observation opening. The sealing rubber mat is arranged at the groove of the ash falling opening, so that the ash falling opening is in mechanical sealing connection with the ash discharging valve, it is ensured that the falling ash does not escape in the collecting process, secondary pollution can be prevented, and meanwhile the ash falling opening