Abstract: Electric vehicle charging piles（EVCP）planning is usually carried out for larger areas at the district and county level,but EVCP planning for park-level areas is more conducive to improving investor’s motivation and the experience of neighboring electric vehicle（EV）users. Taking the large parking areas with large traffic flow as study object,the battery capacity,parking situation,state of charge distribution and charging willingness of EVs in the region are obtained through the survey. Then based on these statistical data,the Monte Carlo method is used to carry out the time domain of EV charging load distribution. Then according to the grid information and the EV charging load distribution in the region,the EVCP planning method is proposed with the comprehensive optimization of investment,grid line loss and user satisfaction. Finally,a large parking lot of an airport is taken as an example to verify the effectiveness of the proposed EVCP planning method. Compared with the traditional EVCP planning,the proposed method is more economical and reasonable.