The invention discloses a method for improving the crystallization degree of pseudo-boehmite. The method comprises the following steps: adding 2-20 parts by weight of water to 1 part by weight of pseudo-boehmite, adding a soluble alkali to adjust the pH value to 8-11 or adding a soluble acid to adjust the pH value to 1-4, stirring for 10-100min, filtering, washing, and drying to obtain high-crystallization-degree pseudo-boehmite. The method makes low-crystallization-degree pseudo-boehmite produced under ordinary process conditions be converted into the high-crystallization-degree pseudo-boehmite. Amorphous aluminum hydroxide which is dissolved out can be continuously recycled without secondary pollution.