Abstract:When the ground surface at the entrance of tunnel is sloping,the structure of double-arch tunnel with half-open and half-hidden structure is an optimum pattern to be selected. But the rational construction method of this structure hasn¢t studied much. Based on a typical tunnel case,three construction methods of the double-arch tunnel with half-open and half-hidden structure are put forward. Then,from the aspects of theory analysis,mechanical calculation,construction convenience,time limit,and environment influence,etc,the advantage and disadvantage of these three methods are compared. A conclusion is drawn that,for the double-arch tunnel with half-open and half-hidden structure,the construction method with the hidden tunnel excavated first and the open tunnel excavated second is better than the other two construction methods,because this method is beneficial to the steady of surrounding rock and lining of tunnel,and also has some advantageous to construction convenience and time. The conclusion will be a guide to the other similar engineering.