Objective  To improve the success rate of crystal embedding of human (animal) pipeline cast specimens for long-term preservation and application of cast specimens better.    Methods  The selection of embedding mold, specimen fixation, adjustment of the proportion of glue, grinding and polishing were improved, and a crystal embedding model of a fetal lung duct cast specimen was made to explore and optimize the simple and efficient production process of a crystal-embedded human (animal) pipeline casting specimen.    Results  The crystal model produced after the improvement had great transparency, beautiful shape, no bubbles, and no mold branches broken. The distribution and running of the casted branches of the fetal lung of the crystal model could be observed clearly in the embedded middle fetal lung through any angle and orientation, which was consistent with the cast specimens before embedding, and had a strong sense of three-dimensional space.  Conclusion  The improved process is better for embedding human (animal) pipeline casting specimens, which is conducive to long-term preservation. It is better for clinical anatomy teaching and exhibition in life science museum.