The invention discloses an oscillating opening 
fiber carding method. The oscillating opening 
fiber carding method comprises the following steps: a, a 
fiber layer unwound from a 
fiber roll is fed to alicker roller by a feeding roller to perform opening, and the long fibers in the 
fiber layer are fully opened and loosened under the oscillating 
opening action of opening needle teeth; b, the 
fiber layer is striped by a cylinder after the 
fiber layer is opened by the licker roller, and the fiber is subjected to oscillating opening further; c, the stripped fiber layer enters a cylinder-cover platecarding area with the cylinder, and are carded into singe fibers; d, the carded fiber layer goes out of the cylinder-cover plate 
carding area, and enters a cylinder-doffer carding area, and oscillating carding is performed on the fibers between cylinder blunt scaly needle teeth and doffer carding needle teeth; e, the condensed fiber layer is stripped by a stripper roller to form a fiber net, the fiber net is gathered by a 
bell mouth and is squeezed by a big pressing roller to form slivers. The oscillating opening fiber carding method is suitable for caring when the fiber material has a low thread density or when the 
fiber strength is low, can prevent the fibers from being stuffed, and can improve the carding effect of low damage and the strong release of the soft and weak fibers.