Waterproof, heat-insulating and energy-saving building outer wall

The invention relates to the technical field of building outer walls, in particular to a waterproof, heat-insulating and energy-saving building outer wall which comprises a building wall body, a mounting support arranged on the outer side of the building wall body, an outer wall plate connected to the mounting support and a distance adjusting mechanism penetrating through the inner side and the outer side of the building wall body. The mounting support is connected to the end, located on the outer side of the building wall, of the distance adjusting mechanism, the distance adjusting mechanism adjusts the distance between the external wall panel and the building wall, the distance adjusting mechanism comprises a pull rod penetrating through the building wall and a jack assembly pushing the pull rod to move axially, and the outer end of the pull rod is fixed to the base plate. The inner end of the pull rod is connected to the lifting end of the jack assembly. Two anti-falling plates are fixedly arranged at the