The Yangshan gold ore belt is located in the arc- shaped structural belt of the Wenxian County in the West Qinling, which is an independent gold deposit belt with the largest proven gold resources in the Mianlue suture zone. After the formation of the gold deposit, the area has experienced multiple stages of tectonic activities. Therefore, the Yangshan gold ore belt is an ideal selection area for studying the thermal history evolution, change and preservation of the deposit. The research results can indirectly limit the time of gold mineralization, and the quantitative uplift and denudation data can provide prospective potential evaluation for deep ore prospecting and deposit storage.After systematically analyzing the data, in this paper, samples of the tonalite porphyry dike in the mineralized contact zone of the borehole were collected, and the LA- ICP- MS fission track dating technology was used to obtain the dating data and track information. The central values of apatite fission track ages of ZK6001- 001, ZK0110- 001 and ZK1820- 001 are 124.3 ± 6.4 Ma (1σ), 146.4 ± 6.3 Ma (1σ) and 117 ± 13 Ma (1σ), respectively. In addition to ZK0110- 001, 22 apatite fission track lengths (mean 12.11 μm, Dpar mean 2.27 ± 0.28 μm) are obtained. The time- temperature curve of thermal history inversion shows that the temperature of the tonalite porphyry vein body in the Yangshan gold ore belt had dropped to the closed temperature range of the apatite fission track (120~60℃) at 146 Ma, that is, in the late Jurassic or after the early Cretaceous. There was almost no large- scale magmatic fluid or hydrothermal activity in the study area, and there is no record of thermal events corresponding to the regional Yanshanian magmatic activity in the same period. Analysis of apatite fission track dating data shows that although there may be a weak thermal event disturbance in the Himalayan period of the gold ore belt, the magmatic hydrothermal activity was small scale and had little contribution to the gold mineralization. Combined with the thermal history time- temperature curve of apatite, the metallogenic time of large- scale mineralization in the Yangshan gold ore belt was concentrated in the range of 210~195 Ma, and the thermal history inversion curve does not show superimposition of mineralization. The comparison with the thermal history of the three ore sections of the Yangshan gold ore belt shows that the Yangshan gold ore belt has differential uplift and denudation, and the Anba ore section is weaker in denudation than the Getiaowan and Nishan ore sections. It is inferred that the ideal location for orebody formation and preservation is the core of the compound anticline with less denudation and greater prospecting potential.