The invention relates to a method for emitting gas with communicating drill holes for an excavation roadway related to a coal-rock roadway. Gas is dissolved or discharged through shallow holes in a part of coal seam through a rock roadway and cross cuts. Then, coal uncovering and driving operation are carried out for the cross cuts. Communicating drill holes are drilled in to-be-driven coal seam roadway direction between every two cross cuts. Wind flows are guided to directly pass the drill holes in order to perform entrainment discharge of gas. Additionally, dirty wind is discharged through the rock roadway such that a driving working face is in the fresh wind. After the method is adopted, the original form of discharge through shallow holes in a coal wall for a driving head is shifted tobe the present form of discharge through the communicating holes. Therefore, discharge efficiency and safety degree are substantially raised.