The 3000m deep scientific drilling of west Sichuan Jiajika lithium mine is located in the Songpan-Garze orogenic belt in the middle and north of the Qinghai-Tibet Plateau. Key technology such as wireline coring drilling and wireline coring hydraulic percussive rotary drilling， diamond bit optimization in hard rock formation， lengthened internal coating inner pipe and improved fishing device， and environment-friendly solid-free polymer flushing fluid technology are adopted. The final hole depth is 3211.21 meters， creating a new record for the depth of small caliber solid mineral exploration holes in plateau areas and a national record for the efficiency of drilling construction of the same type at that time. It has important scientific significance for the theoretical innovation of the metallogenic model and mechanism of the Jiajika pegmatite lithium deposit， and also provides a reference for the deep drilling construction in the plateau area.