Reciprocating driving device and building robot with same

The utility model discloses a reciprocating driving device and a building robot with the same. The reciprocating drive device comprises: a reciprocating drive unit; a cross beam assembly, a mounting base and a first driving assembly, a mounting space is formed in the cross beam assembly; the cross beam assembly sequentially comprises a first cross beam, a second cross beam and a third cross beam in the length direction. A power cross beam section, a standard cross beam section and a driven cross beam section, the two ends of the standard cross beam section are detachably connected with the power cross beam section and the driven cross beam section through a first connecting assembly and a second connecting assembly correspondingly. The installation base is movably arranged on the cross beam assembly, the first driving assembly is arranged in the installation space, and the first driving assembly is suitable for driving the installation base to do reciprocating motion in the length direction of the cross beam