Construction method of foundation pit continuous wall

The invention discloses a construction method of a foundation pit continuous wall, and relates to the technical field of deep foundation pit supporting in constructional engineering, a starting well and a receiving well are respectively arranged at four corners of a predicted foundation pit, continuous wall prefabricated blocks are hoisted in the starting well section by section, and a plurality of sections of continuous wall prefabricated blocks form continuous wall prefabricated blocks through temporary fixing measures; every time the excavation of a groove section is completed, a continuous wall precast block is pushed through a pushing system immediately, and the continuous wall precast blocks are installed and pushed repeatedly until the first continuous wall precast block is pushed to the receiving well; and then the pushing direction of the pushing device is adjusted, continuous wall pushing construction between the starting well and the other receiving well continues to be conducted, and after continu