Solanaceae crops are economically important, but they are not suitable to be cultivated in high density and consume a large amount of water and fertilizer for their large plants. It has been well known that phytohormones play an important role in regulating plant height via modulating cell division and cell elongation. Accordingly, mining dwarf genes and creating dwarf germplasm have been the important base for improvement of plant architecture in Solanaceae crops. Here we firstly summarized the biological function of the phytohormones modulating plant height, furthermore emphasized the mechanism of hormone-related dwarf mutation in Solanaceae crops. Finially proposed a simple and efficient strategy of gene mining and utilization by modern molecular biological technique based on dwarf mutant.