The invention discloses a bearing device for fixed length moving cutting of a textile fabric. The bearing device comprises a strip-shaped bearing base. A strip-shaped hollow shell is fixedly connected to the upper surface of the strip-shaped bearing base. A first semicircular through groove is formed in the upper surface of the strip-shaped hollow shell. A first semicircular uncovered shell is embedded into the first semicircular through groove. A plurality of first rotating circular shafts are arranged at one end of the upper surface of the first semicircular uncovered shell. The multiple first rotating circular shafts are sleeved with a second semicircular bottomless shell matched with the first semicircular uncovered shell, a bearing mechanism is arranged inside the first semicircular uncovered shell, a moving cutting mechanism is arranged on the front surface of the strip-shaped hollow shell, a moving mechanism is arranged on the lower surface of the strip-shaped bearing base, a measuring mechanism is arranged on the front surface of the second semicircular bottomless shell, and a controller is arranged on the side surface of the strip-shaped hollow shell. The bearing device has the advantages of being simple in structure and high in practicability.