Ca~(2 )

Mg~(2 ) contents of cave water and their changes are the basic and direct reflecting carriers to the maturity of speleothems.The samples of surface water

bedrock water and cave water were gathered and analysed

such conclusions were drawn:(1) There is no great vibration of Ca~(2 )

Mg~(2 ) contents in cave water

with a 44~52 mg/L content of Ca~(2 ) and 32~45 mg/L of Mg~(2 ).Maybe Ca~(2 ) is the main material resource of speleothems

furong Cave lives in such a development phase that Ca~(2 ) deposit completely and almost without Mg~(2 )deposition.(2) The ratio of Ca~(2 )and Mg~(2 )

to some degree

may be a reflection of the maturity of speleothems

the different permeability in different carbonate area affects on the ratio and degree of depositing.(3)There is no strong relationship between Ca~(2 )

Mg~(2 ) contents of cave water and development of cave landscape.(4)The change of cave landscape for recent 10 years is closed mainly with the change of Ca~(2 ) content and almost no relationship with Mg~(2 )

the ascending of temperature due to energy import has little effect on speleothems

but the change of pH does greatly.