A detailed process mineralogy study was conducted on a quartz vein gold-bearing ore,and a gravity separation-gravity separation tailings flotation test and gold loss state inspection were carried out based on this study.The results showed that gold is the sole valuable element to recover with a grade of 1.78 g/t.The main gold minerals are native gold and electrum,which are disseminated in the form of encased gold,accounting for 45.33 %.The particle size is mainly concentrated at -0.037 mm,totaling 78.98 %.By using the gravity separation-gravity separation tailings flotation process,the total gold recovery rate was 94.80 %.The gold minerals lost in the flotation tailings mainly exist in the form of encased gold in vein minerals.The leaching effect of the target minerals is good,and the gold loss characteristics are in line with the results of the process mineralogy study.