Abstract:Fissure-karst water-bearing system of Changgou water s ource in Jining city is influenced by pore water and surface water. By Using gre y association ratio,water dynamic state and chemical components between fissrue-karst water and pore water, and between fissure-karst water and surface water a re contrasted and analyzed seperately. It is confirmed that pore water and Canal water has a more close ralation than that between canal water and karst water. Along the Canal, pore water and fissure-karst water have a recharge-discharge re lation, while in south of the Canal, canal water and fissure-karst water have no direct water power relation.