A casing round pipe, comprising a round pipe body (1). An arc-shaped pressing piece (2) is arranged on each of two sides close to one end of the round pipe body, and a square pressing piece (4) is arranged on each of two sides close to the other end of the round pipe body; each square pressing piece comprises a square pressing piece opening and closing end (401) and a square pressing piece finger pressing end (402), and the square pressing piece opening and closing end and the square pressing piece finger pressing end are integrally connected; the casing round pipe is used as a casing support part, not only focuses a casing unloading function, but also is featured by smoother casing loading.

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