The Dulanggou gold deposit is a typical quartz vein type gold deposit, which is located at the edge of the dome in the Danba metallogenic belt. A large number of visible gold and tellurium-bismuth minerals are developed in the deposit. Taking tellurium-bismuth minerals and native gold in Dulanggou gold deposit as the main research object, the occurrence states of tellurium-bismuth minerals and native gold in the deposit were studied in detail through microscopic petrography observation, scanning electron microscope, energy dispersive spectrometer and electron probe analysis. Simultaneously, the enrichment mechanism of gold was also discussed. The results show that native gold and tellurium-bismuth minerals were mainly produced in the Ⅱ and Ⅲ mineralization stages of the Dulanggou gold deposit. The native gold in the Ⅱ and Ⅲ mineralization stages is mainly silver-bearing native gold, and the gold fineness is high with an average of 881, the main tellurium-bismuth minerals are tsumoite, pilsenite, hedleyite, joseite B, unnamed tellurium-bismuth minerals(Bi₂Te、Bi₈Te₃、Bi₃Te) and native bismuth. These tellurium-bismuth minerals have a close relationship with native gold in time and space. Combined with previous studies on fluid inclusions, it is suggested that the decrease of temperature and tellurium fugacity in the system from mineralization stage Ⅱ to stage Ⅲ are the important reasons for the formation of various tellurium-bismuth minerals. The physical and chemical conditions of the mineralization of the Dulanggou gold deposit, as well as the mineral characteristics of tellurium-bismuth minerals and native gold, indicate that the extraction of gold from the hydrothermal solution by the gold-bismuth-tellurium melt during the mineralization process is the key to the enrichment of native gold in the mineralization process.