This standard specifies the classification, specifications and model preparation, technical requirements, inspection methods, inspection rules, marking, packaging, transportation and storage of slab-type ballastless track cement emulsified asphalt mortar trucks (hereinafter referred to as mortar trucks). This standard is applicable to the mixing and pouring of railway slab-type ballastless track filling layer mortar, the mortar trucks used to construct semi-trailer chassis structures while running offline, and the mortar trucks that are used to construct self-made special chassis structures and track chassis structures running online. Mortar trucks used in other types and special working conditions can also refer to this standard.