For distinguishing the potential periodicity and the relationship between shallow and deep earthquakes in Northeast China,this paper conducted the Rydelek-Sacks test based on various earthquake catalogues to consider the influence of selected magnitudes on the periodicity.The results of the study are: 1) deep earthquakes in northeastern China region have an obvious and stationary active period; 2) periodicity of shallow earthquakes probably depends on magnitude; and 3) good correlation between deep earthquakes and ML4.5~5.0 shallow ones show that in northeastern China deep earthquakes may influence on the shallow earthquakes with magnitude even lower than MS5.0.