本文选取我国邢台地区、海城地区和唐山地区的100个地震,量取北京台基式仪记录同一个地震波的Sm等震相和面波相应周期的地动位移振幅,分别统一测定了震级M_L和M_s,采用最小二来法计算给出中国地震震级M_L和M_s的折合关系式M_s=1.04M_L-0.69,通过检验对比表明,这一关系式较适合于中国地区。同时指出,深入研究M_L与M_s的关系,对于认识不同波段上地震波能量的分配,揭示震源的物理特征,具有一定的意义。 This paper selects 100 earthquakes in Xingtai area, Haicheng area and Tangshan area in our country, taking the Beijing station-based instrument to record the amplitude of ground motion displacement of Sm and seismic phase and the corresponding period of the same seismic wave, And M_s, the least-squares method is used to calculate the equivalent relation M_s = 1.04M_L-0.69 of China earthquake magnitude M_L and M_s. The comparison shows that this relationship is more suitable for China. At the same time, it is pointed out that in-depth study of the relationship between M_L and M_s is of great significance for understanding the distribution of seismic energy in different wavebands and revealing the physical features of the seismic source.