Abstract: A questionnaire investigation is carried out to study the current situation and influencing factors of carpool in Yanta District of Xi'an City.1 000 car owners and 1 000 passengers are chosen as the subjects of the investigation based on non-proportional stratified sampling method.The results show that the percentage of people who have already participated in carpool is only 2.7%.Although it is a low proportion, car owners and potential passengers have shown willingness to cooperate in the future and the foundation of such cooperation is ready.Influencing factors on carpool includes safety, extra time-consuming, economic conditions, age, gender, etc.Suggestions that may promote carpool are given: ensure safety of carpoolers;enhance support for carpool;encourage commuters' carpool;use taxi stops as carpool waiting stops;and appropriate use of bus lanes.