Smearing mechanism and smearing robot

The invention relates to the technical field of building machinery, and discloses a smearing mechanism and a smearing robot. The smearing mechanism comprises a support assembly, a trowel, a feeding bag, a pressing plate assembly and an elastic piece, wherein the trowel is arranged on the support assembly; a trowel feeding port and a trowel discharging port are formed in the trowel; the feeding bag is arranged on the support assembly and provided with a feeding bag feeding port and a feeding bag discharging port; the feeding bag feeding port communicates with the feeding mechanism; the feeding bag discharging port communicates with the trowel discharging port; the pressing plate assembly is rotatably connected with the support assembly; the extending direction of the pressing plate assembly is perpendicular to the discharging direction of the feeding bag; a first end of the elastic piece is connected with the support assembly, and a second end of the elastic piece is connected with the pressing plate assembly;