Due to the influence of neotectonic movement of the earth's crust, the cave rose. After it is completely or partially separated from the groundwater level, it will accept the seepage of surface water, and its seepage water will also undergo carbonization reaction during the top-down migration in the cracks of limestone layer, so that the cracks will be eroded and expanded continuously. If this kind of water containing calcium bicarbonate (also called karst water) seeps from the cracks in the roof or wall of the cave, due to the change of physical and chemical conditions, part of the water in the karst water evaporates and carbon dioxide escapes, thus forming a secondary chemical deposit of calcium carbonate-stalactite. Stalactite is a general term for secondary chemical deposits. Stalactites that grow downward from the top of the cave are called stalactites, such as the "sword leaning on heaven" and "sword dripping water" in the cave. Stalagmites growing upward from the bottom of the cave are called stalagmites, such as "Fushou Double Star" and "Zhinv Stone" in the cave. Stalactites and stalagmites are connected up and down, such as the "Qingtian Yuzhu" in the cave; Curtain-like stone curtains and waterfalls formed on the side walls are collectively called wall flow stones. The reason why stalactites have different shapes is that they are formed in different environments and the conditions and properties of karst water flow. Some of them are formed by non-gravity water deposition, such as curly stones. Some are formed by gravity water deposition, such as goose tube, stalactites, stalagmites and stone pillars; Stone belts, stone flags, stone curtains, stone waterfalls, stone steps, edge stone dams, stone dams, calcium slabs, etc.; Some are stone grapes and corals deposited by splashing water; There are also many kinds of stalactites formed by pool water deposition and synergistic deposition.