A planning method for locating and sizing of multi-type distributed generation is proposed based on the analysis of the investment and income brought by many types of grid-connected distributed generation. This method analyzes the timing characteristics of load and distributed generation output and the environmental benefits of distributed generation. The typical daily load sequence and the typical daily output sequence of distributed generation per capacity are calculated on the basis of the classification of daily load sequence and daily output sequence of distributed generation. The mathematical planning model with the location, capacity and type of distributed generation as the optimization variables is established and the improved adaptive genetic algorithm is used to solve the model. Finally, a practical example is employed to verify the feasibility and effectiveness of the proposed method and model.