Pressing top painting device for groove construction of parapet wall

The utility model belongs to the technical field of painting devices, and particularly relates to a coping painting device for groove construction of a parapet wall, which comprises a handle and a roller brush, a first cross shaft is fixed at the front end of the handle, the upper end and the lower end of the first cross shaft are rotatably connected with a first positive short rod, and the front end of the first positive short rod is rotatably connected with a first positive long rod; the middle part of the first positive long rod is rotationally connected with a second cross-shaped shaft, the front end of the first positive long rod is rotationally connected with a second positive long rod, the middle part of the second positive long rod is rotationally connected with a third cross-shaped shaft, the front end of the second positive long rod is rotationally connected with a second positive short rod, and the front end of the second positive short rod is rotationally connected with a fourth cross-shaped shaft