The invention provides a alarm processing method that comprises following steps: judging whether the times of generation and elimination is exceeded the preset surge generating threshold, if the timesof generation and elimination is exceeded the preset surge generating threshold, judging the generation and elimination of alarm enters surge state, and the generation and elimination of alarm are not reported. The invention also provides a light transmission router. The invention realizes the identification of alarm surge of router link layer, so repeat start of system is avoided; the consumption of resource is decreased.