Abstract: 【Objective】To provide a reference for the reproduction biology and molecular cytogenetics research of Cryptomeria fortunei, we studied the meiosis process of the pollen mother cells, including the transformation and abnormal behavior of the chromosomes. 【Method】Taking the male strobilus of C. fortunei as experimental material, the variation in the meiosis of the pollen mother cells of C. fortunei was studied using carbol fuchsin staining. 【Result】The cytokinesis of the pollen mother cells of C. fortunei was the simultaneous type, with the process generally starting in mid-late October and lasting until early November. The change in the color of the male strobilus was related to the process of meiosis. Additionally, the development of different staminate male strobilus on the same lateral branch was inconsistent and the meiosis of different staminate strobilus on the same inflorescence was not synchronous. Abnormal phenomena were observed, such as monochromatic chromosomes, unequal bivalents, lagging chromosomes, unsynchronized division, inhomogeneous division, abnormal tetrads, and so on. 【Conclusion】The change in the color of the male strobilus of C. fortunei was closely related to the meiosis process. Additionally, abnormal phenomena of the chromosomes exist during meiosis. These results can provide a theoretical basis for the cytological study of staminate strobilus.