Optical characteristic of a nitrogen heterocyclic type rhodamine-based thiacalix[4]crown chemosensor has been investigated by UV-vis and fluorescent spectrophotometry.The results show it displayed high recognition properties for the detection of Fe~(3+),and the Fe~(3+)-1 complex can be used as a selective chemosensor for Pb~(2+),Ba~(2+) and K~+ in the ethanol aqueous.