in present, most of the river face a problem about the quantity of water hyacinth. They breed increasingly and have a large quantity. Just only 1 month, one of the water hyacinth can breed approximately 1000 species. moreover they cause a problem with the river and the ecological damage that maybe serious. so we found that the properties of water hyacinth has the ability to maintain moisture in water more than a straw, it has the properties of water hyacinth was used to grow mushrooms . so we have prepared the project to compare the efficiency of fresh and dried water hyacinth mushroom crop straw so that water hyacinth is utilized, and reduce the amount of water hyacinth in rivers, canals.