Integral lifting operation platform for shaft in ultra-deep vertical well and construction method of operation platform

The invention discloses an integral lifting operation platform for a shaft in an ultra-deep vertical well. The operation platform comprises embedded screw rods, wall attaching pieces, an outer operation frame base, an outer operation frame and an inner operation frame. A construction method comprises the following steps that firstly, according to a traditional construction process, bottom-layer shaft construction is conducted, and the embedded screw rods are embedded on a well wall; the wall attaching pieces, the outer operation frame base, the outer operation frame and the inner operation frame are sequentially arranged; personnel finish upper-layer shaft construction on the operation platform, and the embedded screw rods are buried in the well wall during shaft construction; after a formis removed, the wall attaching pieces of this layer are arranged, the outer operation frame base and the outer operation frame are integrally lifted upwards through hoisting equipment to be placed onfoldable steel sheets of