本文根据Ｈｅａｓｋｅｌ二维矩形地震破裂模式，导出了以ω立方的波谱衰减，在分析地震破裂过程特征、考虑三个主要的相似性假定基础上，即假定地震满足断层面几何相似、应力环境相似和动力学相似条件，研究了大小地震相似性问题的标度分析，建立了地震破裂和源参数之间的标定律关系。用云南地区２０多年中数百个地震的地震矩Ｍ０、面波震级Ｍｓ和近震震级ＭＬ系统以及有关的地震参数，建立了适用于云南地区的地震标定律关系。由此估算了丽江主震及部分强余震的震源参数，并对该次主震的破裂过程进行了初步的研究。本文的研究结果给出，丽江７０级主震的断层破裂长度３３ｋｍ，宽度１６ｋｍ，断层破裂面积４９０ｋｍ２，平均位错０７８ｍ，地震矩Ｍ０＝１２５×１０１８Ｎｍ，总破裂时间Ｔ＝１３８秒，发震应力背景τ０＝３３７ＭＰａ，应力降Δσ＝４６ＭＰａ。对破裂过程初步研究结果表明，好象是两条新老断裂参与了活动，初始破裂为北西方向较老的中甸—丽江断裂，破裂长度约１３ｋｍ，破裂持续时间约５４秒；主破裂为近南北向的次级断裂，是一条比较新的活动断裂，破裂长度约２０ｋｍ，破裂持续时间８４秒，表明该次地震破裂过程的复杂性 Based on Heaskel two-dimensional rectangular earthquake rupture mode, the spectral attenuation of ω-cubic is deduced. Based on the analysis of the characteristics of the earthquake rupture process and considering three main similarities and hypotheses, we assume that the earthquakes satisfy the geometrical similarity of fault planes and the similar stress environments Similarity conditions of dynamics are studied. The scale analysis of similarities between large and small earthquakes is studied. The relationship between the rupture and the source parameters is established. Based on the seismic moment M0, surface wave magnitude Ms and near earthquakes ML system and the related seismic parameters of hundreds of earthquakes in Yunnan over 20 years, the seismic calibration law applicable to Yunnan region is established. Based on this, the source parameters of Lijiang main shock and some strong aftershocks are estimated, and the rupture process of the main shock is preliminarily studied. The results of this paper show that the fault rupture length of 33km, width of 16km, fault rupture area of ​​490km2, average dislocation of 078m, moment of M0 = 125 × 1018Nm, total rupture time T = 13.8 seconds, seismic stress background τ0 = 337MPa, stress drop Δσ = 46MPa. The preliminary study on the rupture process shows that it seems that two new and old faults are involved in the activity. The initial rupture is the older Zhongdian-Lijiang fault in the northwestern direction with a rupture length of about 13km and a rupture duration of about 5.4 seconds. The main rupture Is a near-north-south sub-fault, which is a relatively new active fault with a rupture length of about 20km and a rupture duration of 8.4 seconds, indicating the complexity of the earthquake rupture process