Our special urea hose designed for diesel vehicles is provided with a hyposmosis composite nylon hose made out of ETFE/PA12 as inner hose, and an electrical heating function at automatic temperature control with voltage of 24VDC, peak of 32VDC, and the maximum limit temperature smaller than 70°C, and two ends of all hoses are furnished with special quick couplers. It can heat up urea, and make it normally flow at a temperature 11°C below zero to maintain vehicle safety. It can be widely used in trucks, passenger cars, engineering machinery, agricultural vehicles and military vehicles which take diesel engine as power.