Perovskite solar cells (PSCs) have attracted enormous attention owing to their high power conversion efficiency and low cost. In this work, solvent engineering techniques for PSCs are reviewed using co-solvents, anti-solvents, and solvent additives. In the part of co-solvents, binary solvent systems and ternary solvent systems illustrate their respective properties and their application in PSCs. In the part of the anti-solvents, the use of a common anti-solvent such as chlorobenzene or toluene in the solution treatment provides a method for preparing a pinhole-free and dense structure perovskite film. Meanwhile, the continuous exploration of green anti-solvent projects has made it possible to mass-produce mixed-stabilised perovskite films, which is pinhole-free and uniform. In the solvent additives section, the application of different additives can slow down crystal growth and increases the stability of the PSC. Each section outlines the application and potential of solvent engineering technology to improve the performance of PSCs, illustrating potential applications in the future. This work aims to provide some ideas for the improvement of PSC performance and accelerate another leap of solvent engineering technology in the field of PSCs.