Abstract: The Gaotan survey area in Guangdong Province is the core area of the Lianhuashan tin-cop⁃ per polymetallic metallogenic belt with complex geological structures.Through the field geological survey of the survey area，the geological characteristics and typical ore spots are studied，and the metallogenic condi⁃ tions are analyzed. The results show that the deposits and ore points in the area are spatially distributed along the Lianhuashan fault zone in the northeast-southwest direction.In addition to the occurrence in the contact zone of the intrusive rock，the other Upper Triassic-Lower Jurassic strata in the external contact zone are closely related to the Triassic-Jurassic strata.The development of NE-trending structures in the area con⁃ trols the formation and distribution of ore-forming parent rocks，and provides ore-conducting conditions or ore-accommodating space for the enrichment of ore-forming elements.The Gaotan survey area has superior metallogenic geological conditions，and the prospecting potential of tin polymetallic deposits is great.

Key words: Lianhuashan faultzone, metallogenic condition, tin polymetallic ore