As an important factor of production in the era of digital economy，data presents a “blowout” development trend，while China’s data factor market is still in the embryonic stage. Focus on promoting the marketization construction process of data elements through data capitalization so as to help the high-quality development of digital economy. Through the analysis and research of data capitalization which includes clarifying the definition of data，determining the ownership of data，pricing of data assets and trading of data，the report puts forward some suggestions to promote the marketization of data elements which are building a hierarchical and classified right confirmation system of data，using blockchain to register data right，accelerating the establishment of data pricing rules，and exploring the establishment of a “data bank” trading platform.