The study shows that when the seismic wave passes through a relatively stable area,the attenuation is not obvious and has a high value. And through the tectonic activity,the energy will be strongly attenuated and have a low value. In this paper,the Sato model was used to record more than two hundred ML ≥ 3.0 earthquakes recorded by 15 different stations in the north of Luobei-Tonghe area(44°~49°N,126°~136°E). Qc values were analyzed and studied,and the Q value near Luobei,Heilongjiang have complexity and difference,and the reason is related to regional tectonic activity. Generally speaking,where tectonic activity and seismic activity are strong,the Q value is low. The value of coda wave of the Luobei area is much lower than that of the Tonghe area,which is related to the complex crust structure,the degree of underground media fragmentation and the change of internal stress in the Luobei and Tonghe area. This paper also discusses the relationship between the quality factor and the frequency change,and the spatial distribution characteristics of the quality factor and the Q0 value are obtained,which can effectively analyze the process of the state of the media in the region,and which is very important for the research and prediction of the seismic activity in the Luobei area.