The invention discloses preprocessing methods for degummed ramie production and belongs to production methods of natural textile fiber. The problems that an existing ramie preprocessing method is simple, the effect is not obvious, and burdens are caused by waste water treatment in which strong acid, strong base and the like are used are solved. The preprocessing method sequentially comprises the steps of rubbing and pressing processing and solvent processing, and a damp and hot processing step can be added to the solvent processing step. The other preprocessing method sequentially comprises a rubbing and pressing processing step and a damp and hot processing step, after the processing, impurities (accounting for 7.4% in total) in ramie bast can be reduced obviously, the content of sundry fungus attached to the ramie bast is reduced, the ramie fiber is exposed further, the looseness and the softness of the ramie are increased, the subsequent chemical or biological degumming processing is conducted easily, and the quality of the degummed ramie is improved further.