The invention discloses an effect improving method for progressive and classified pyrolysis and energy gathering of waste. The method aims to overcome the defects that in an existing waste pyrolysis process, dioxin is likely to be generated, the environment is polluted, the pyrolysis effect is poor, auxiliary energy consumption is needed, and the construction and operation cost of a project is high. The method comprises the steps that firstly, hot air at the temperature below 300 DEG C is introduced into waste for pyrolysis, and gas phase combustible organic matter is guided out; then the gas phase combustible organic matter is mixed with hot air at the temperature of 500 DEG C, obtained combustible smoke and the guided gas phase combustible organic matter are mixed with hot air at the temperature of 600 DEG C for incineration and pyrolysis, and heat exchange is conducted between obtained high-temperature flame gas and air; and the obtained hot air is input into the step a, the step b and the step c for utilization. The method is mainly used for harmless environment-friendly treatment of household waste and medical waste, the situation that the dioxin is generated during waste pyrolysis, and accordingly the environment is polluted can be avoided, and heat energy generated during waste pyrolysis is used for classified waste incineration and pyrolysis in the hot air mode; the energy is greatly saved, the effect is good, the efficiency is high, the investment is reduced, and the practicability is high.