中国石油勘探战略东移是毛泽东、周恩来等老一辈领导人做出的重大决策，石油部、地质部积极执行，联合攻关，发现了大庆油田。李四光先生为中央决策提供了重要的咨询建议，地质部在提供区域和局部构造的地球物理和地质资料，为确定松基3井井位做出了重要贡献；石油部在综合研究地质资料确定松基3井井位，高速度、高质量地完成深井钻探、取芯、试油评价方面也做出了重大贡献。文章根据当事人写的回忆录从多方面对这一事件做出论证，并总结了这一时期找油成功的基本经验，以期能为新世纪地质找矿工作的战略转变提供借鉴。

The paper reviews the eastward strategic shift of China's oil exploration in 1950s and the discovery of Daging Oilfield. The joint efforts by the former Ministry of Petroleum, the former Ministry of Geology and the Chinese Academy of Science are described. Also described are the contributions by Mr. Li Siguang in giving advice to the Central Government for decision - making, the former Ministry of Geology in providing geophysical and geological data, and the former Ministry of petroleum in conducting comprehensive research and organizing and accomplishing such work as deep - well drilling, coring, formation test evaluation, etc. The paper sums up the basic experience in oil exploration in 1950s aiming at to provide references for geological prospecting of minerals in the new century.