The invention relates to the technical field of road construction and maintenance, in particular to a construction method of a cement-emulsified asphalt mortar injecting type semi-flexible pavement. The construction method of the semi-flexible pavement comprises the steps that a lower bearing layer is paved with coarse aggregate macadam, well-blended cement-emulsified asphalt mortar is injected into gaps of the coarse aggregate macadam after leveling and pressure stabilizing are conducted, and the semi-flexible pavement is formed through the steps of maintaining, rolling forming and the like. According to the construction method of the cement-emulsified asphalt mortar injecting type semi-flexible pavement, the construction technology is simplified, miniaturization, simplification and minimization of matched construction machinery equipment are achieved, materials used in the method are common, the construction technology is simple and easy to master, application and popularization are convenient, construction can be conducted at room temperature, and wide application is achieved.