Open four-to-vertical centrifugal sieve sludge separator uses a vertical conical sieve structure, sieve sludge rotates around the vertical axis, the sludge enters the conical sieve bottom through the feeding mouth tube, subject to centrifugal force, the water as a medium of the sludge rotates along the sieve wall circumference, the potato sludge moves from the sieve's small end to the big end direction, during the movement, the starch emulsion in the centrifugal force effect, flies out through the sieve into the collecting tank, by the drainage into the next process, the potato sludge is blocked by the sieve, continues to move up until the big end edge of the sieve, flies out along the cutting line direction, falls into the inside. Kä ye kek tɔ̈ɔ̈u në tɛ̈n de tɛ̈n de tɛ̈n de tɛ̈n de tɛ̈n de tɛ̈n de tɛ̈n de tɛ̈n de tɛ̈n