A mining method is provided without coal pillars with roof-cutting and roadway retaining. This includes, comprising: constructing a gas drainage roadway and eliminating outbursts in a working face transport gate area and track gate area on opposite sides of a first mining working face; constructing various components with an air return roadway. Another end is communicated with the gas drainage roadway by the first process roadway, one end of the working face track gate is communicated with the air return roadway, the other end is communicated with the gas drainage roadway. A ventilation system is formed. This makes full use of the existing gas drainage roadway to meet the roadway layout requirements using the 110 construction method, increasing the use function of the roadway and increasing the reuse rate of the roadway, reducing the roadway engineering quantity before production, shortening the construction period and reduce the cost.