The invention discloses a set method of a fixed segment depressing continuous caster depressing mode and belongs to the technical field of steelmaking and continuous casting. A continuous caster has t sector segments with the depressing function; a starting sector segment with the depressing function is defined as a segment 1, and then the following sector segments with the depressing function are defined as a segment 2, a segment 3, a segment 4......, a segment i-1, a segment i, a segment i+1......a segment t; the segment i is an arbitrary sector segment at the middle part; and as for arbitrary sector segment i, the depressing quantity of an inlet of the arbitrary sector segment i is defined as ni-1, the depressing quantity of an outlet is defined as ni, and the depressing quantity ni-1 of the inlet of the segment i is equal to the depressing quantity ni-1 of the outlet of the segment i-1. The set method has the advantages of easiness in realization and suitability for various drawing speeds.