Abstract: BanDa tin polymetallic deposit is located in the northwestern part of the Changshan metallogenic belt, which is a medium-sized tin polymetallic deposit newly discovered in recent years, and is expected to break through to a large-sized tin polymetallic deposit with the deepening of the exploration. At this stage, the ore body is mainly deposited in the nearly SN-oriented tectonic fracture zones and interlayer fracture zones in the muddy siltstone and silty mudstone of Khang Khai Formation of the Permian System, and the production, spatial distribution and morphological characteristics of the ore body are strictly controlled by the joint control of NE-oriented fracture, nearly SN-oriented fracture and interlayer fracture zones. The ore body is mainly vein-like, fine net vein-like, strip-like, honeycomb-like in the fracture zone and interlayer fracture zone, the ore body along the course and tendency of the change is large, with branching composite, cusp extinction reappearance and cusp extinction of the side of the phenomenon. The ore body is dominated by cassiterite, followed by sphalerite and chalcopyrite, and the ore structure is dominated by other-autogenous granular structure, and the ore structure is dominated by dipping structure, which makes the deposit a tectonic-hydrothermal filling and accounting type tin polymetallic deposit. The deposit is considered to be a tectonic-hydrothermal filling and accounting type of tin polymetallic deposit, and five major ore searching markers have been identified: outcrop marker, lithological marker, tectonic marker, peripheral rock alteration marker, and geophysical and geochemical markers, which will play a guiding role for the next step of the ore searching and exploration in the deep part of the deposit, and for the searching and exploration for tin polymetallic ores in the northwest section of the Changshan metallogenic belt.