The invention provides an excavation construction technology of a foundation pit slope and the foundation pit slope, and belongs to the field of building construction. The construction technology comprises the following steps: constructing piles of a foundation pit; excavating a slope; constructing an intercepting ditch on the top of the slope, wherein the intercepting ditch is positioned at the outer sides of the protecting piles; laying a steel wire net on the surface layer of the slope; fixing the steel wire net on the slope through a plurality of groups of fixing assemblies; and then spraying concrete on the steel wire net until the steel wire net is covered with the concrete, wherein a concrete layer formed by the concrete is not less than 50mm in thickness. The construction technology is convenient and fast to operate, and safe and reasonable in construction; both time and force can be saved in the construction of the foundation pit slope; after being constructed, the foundation pit slope is high in stability, and hard to collapse and displace during subsequent construction, so that a good environment is provided for the subsequent construction, and the construction is sped up, and as a result, the construction period is reduced, and the construction cost is saved.