With the global fossil energy exhausting and environmental pollution is getting more and more serious day by day, how to improve the discharge quality and realize energy saving of construction machinery has attracted wide attention of construction machinery manufacturers and users. Petrol-Electric Hybrid technology in recent years has become an important research direction of energy saving and consumption reduction of construction machinery, and has been highly valued by the field of construction machinery. According to the research work and the accumulation of literature, the research status of Petrol-Electric Hybrid construction machinery was summarized in main research institutions at home and abroad, the key technology need to be solved when developing Petrol-Electric Hybrid construction machinery was analyzed, and forecast development trend of PetrolElectric Hybrid construction machinery is forecasted.