Improved drain-hose

An improved soft type drain belongs to underground discharging architectural component. A stainless steel elastic spiral coil is taken to be the holding body. A layer of unweaving cloth which is made by strongly bonding polyester fiber in high temperature is directly bonded on the outer periphery of the holding body. A stiffener which is made of plastic or plastic-wrapping iron wire is arranged inside the holding body. The water permeability of the utility model is good and the parameters all reach the testing requirement of the earthwork synthetic material. The utility mode is provided with good compression resistant performance as well as high flexibility, thus the application scope of the drain is widened and the utility model is more suitable for using in the working-condition occasion with radian such as a tunnel.