In this paper, the article of “Discussion on some problems of quartz—coesite phase transition” written by Profs Ji Shaocheng et al.(2010) has been commented，and some misreading of the new mechansm of nonplate deep subduction fast exhumation，as well as some differences in understanding of the thermodynamics, physics concepts and their interpretation in the Earth science studying have been discussed. Analyzed the mechanical milling mechanism of action, and demonstrated the identity in nature between the role of mechanical milling in laboratory and the extrusionshearing role in the Earth's structure. Discussed the twostage process of the rocks mylonitization ; Analyzed the mechanism of seismic waves to form coesite possibility. Surrounding the issues of standard for comparison, demonstrated that the pressure, temperature and reaction time of making αquartz into coesite are greatly reduced and the formation of coesite is promoted due to the αquartz pretreatment of highenergy mechanical milling. The uneven local smallscale model of highpressure microzone was used to explain the regularity of synthesized coesite in laboratory，the behavior of natural minerals in Antarctica, and the formation of the parasitic rocks and minerals of coesite, zircon, eclogite inclusions, and noninclusion. Cited examples to clarify the misreading of " Fe impurities introduced by ball milling to increase the formation pressure of coesite and delay its synthesis"; discussed the effect of existence of second phase matter on quartz—coesite transition，and the problem that the stress gradient driving force at border zone (not center zone) of strain forbidden zone can promote the coesite to form. Showed the twostep systhesis method of the mechanical milling pretreatment of raw materials quartz combining the static highpressure coesite synthesized postprocessing is an effective physical method of laboratory study the formation regularity of coesite in the Earth's structure; and the model of uneven local highpressure microzone and the mechansm of nonplate deep subduction fast exhumation would be a promising new mechanism for the formation of coesite in the Earth's crust.