In order to obtain the fracturing design parameters of the parametric well， it is necessary to perform array acoustic logging and micro-lateral resistivity logging， and obtain large diameter cores for mechanical test. With solid core drilling and coring technology， the borehole diameter can not meet the requirements of running geophysical logging tools， and the core diameter can not meet the experimental requirements， too. As a result， large diameter coring technology needs to be adopted to meet the design requirements. Meanwhile， the conventional coring process can not meet the requirement of shale gas exploration on the core （shale or coal core） retrieving time； but the wireline coring process has obvious advantages in this respect. This paper introduces the successful application of large diameter wireline coring technology in Chuanlincan-1. According to the structural characteristics of the large diameter wireline coring tool and the lithological characteristics of the target formation， the proper technological parameters and technical guarantee measures for coring drilling are summarized， and good results are achieved.