With the advance of nanotechnology, the previous couple of years have witnessed the quick improvement of quasi two-dimensional (2D) halide perovskites, which exhibit excellent long-term stability in opposition to moisture and warmth, in contrast with their three-dimensional (3D) counterparts. As one of the frequent buildings in 2D halide perovskites, quasi-2D Dion–Jacobson (DJ) perovskites present multiple-quantum-well buildings with n layers of [BX₆]⁴⁻ octahedral inorganic sheets sandwiched by two layers of diammonium spacers, thus exhibiting superior structural stability as a result of elimination of van der Waals gaps. Due to the achievement of excessive energy conversion effectivity accompanied by spectacular stability, quasi-2D DJ perovskite photo voltaic cells (PSCs) have not too long ago drawn intensive consideration within the discipline. This evaluate first introduces the elemental understanding of quasi-2D DJ halide perovskites, together with their superior stability, excessive exciton binding power, and compositional flexibility and tunable properties. We then summarize detailed methods to arrange high-quality quasi-2D DJ perovskites for PSCs, encompassing compositional engineering, solvent engineering, additive addition, and annealing processes. Furthermore, the floor/interface modification and 2D–3D hybrid perovskite heterojunction are additionally mentioned, for offering methods to optimize the fabrication of quasi-2D DJ PSCs. Lastly, present challenges and views towards the longer term improvement of quasi-2D DJ perovskites for photovoltaics are outlined.