The invention discloses automatic lime-sand mortar laying equipment for architectural decoration and finishing. The automatic lime-sand mortar laying equipment for architectural decoration and finishing structurally comprises an automatic lime-sand mortar laying device, a power connecting block, a power indication lamp, a reinforcing rack, a reinforcing fixing plate, a machine body, moving wheels,a rotating shaft, a groove and a guide tube, wherein the automatic lime-sand mortar laying device is mounted in the machine body; the groove is formed in the upper half end of the machine body; the bottom end of the guide tube is connected with the inside of the machine body in a penetrating manner; and two ends of the rotating shaft are perpendicularly connected with the insides of the moving wheels. By an automatic lime-sand mortar laying equipment of the automatic lime-sand mortar laying equipment for architectural decoration and finishing, water and lime-sand mortar can be stirred automatically, the working intensity of workers is reduced, meanwhile, the stirred lime-sand mortar can be automatically laid, the lime-sand mortar is completely compacted by two-time rolling, hollowing of the lime-sand mortar is prevented, the construction quality is improved, meanwhile, the device further has a watering function, and the working efficiency can be improved further.