With the continuous study of metal halide perovskite, geometry-confined technologies have been widely applied to reduce the material dimensionality and to produce pre-designed structures, which can tune optical reflectance, scattering, and absorption, thereby optimizing the performance of perovskite-based optoelectronic devices and improving their commercial competitiveness. The morphologies of perovskite active layer play a pivotal role in optoelectronic properties and the resulting device performances. In this review, we systematically summarized recent progress in the preparation and manufacture of various perovskite geometry-confined morphologies, as well as their promising advances in different optoelectronic applications, including photodetectors, solar cells (SCs), lasers, and light-emitting diodes (LEDs). In addition, the remaining challenges and further improvements of preparation unique geometry-confined perovskite morphologies for next-generation high quality optoelectronic devices are discussed.