ATG-300H portable hydrogen analyzer was used for continuous observation of spilled hydrogen in the Zhaodong area of Heilongjiang Province. the results show that in the range of 200km away from the observation point, spilled hydrogen is abnormal in Zhaodong before the M3.3 earthquake in Tailai County. Outliers are characterized by high-value leap, abnormal amplitude, short duration, and combined with four abnormal high-value, as the hydrogen concentration strength first increased and then decreased, with the characteristics of continuity and repeatability. Based on the analysis of the abnormal characteristics of spilled hydrogen and the abnormal mechanism of spilled hydrogen in Zhaodong of the high-cold area, this paper provides some factual evidence for the application of spilled hydrogen data in earthquake prediction.