The choice of parking lot takes many factors into consideration, Different travel purposes, the consideration of each factor is different. In this paper, drivers' travel purposes are divided into three categories according to the degree of emergency: emergency type, routine type and leisure type. Four influencing factors including walking distance, charging price, parking index and parking convenience were selected. The sensitivity of influencing factors of parking lot selection was analyzed by using BP neural network method, and the influencing factors were ranked according to the sensitivity. Then, differentiated parking guidance and parking management measures are carried out，to avoid the phenomenon of uneven parking due to random selection of parking lot, and realize the maximum utilization of parking resources.

CICTP