It has been common for local governments to purchase spatial planning technology service from societythrough contract and commission,however few studies have been focused on the price of the service. According to the government procurement information of spatial planning technology projects at city and county levels from January 2017 to March 2020,we analyze winning bids of spatial planning services purchased by local governments and identify the influential factors of price formation and especially the spillover effect of imitating peer projects` price. It will be helpful for improving the effective use of public financial funds. The results are as follows. Firstly,the average purchase prices of municipal and countylevel spatial planning projects are 19.28 million yuan and 8.47 million yuan respectively. Among them,the price for municipal level spatial planning in the western regions is relatively the high,with an average of 23.25 million yuan per project,which is much higher than that in the eastern or central regions. While the purchase price of spatial planning at county level is the highest in the eastern region,with an average price of 9.49 million yuan per project. Secondly,the administrative area,population density,regional economy,planning content,urban development positioning and peer effects are the key factors that determine the prices of local government in spatial planning. At the same time,due to the lack of charging standards and cost accounting methods,the winning bid is similar to that of the peer group of areas that have invited bids. This imitation may lead to price spillovers of 3.4742 million yuan and 1.5365 million yuan for local governments at municipal and county level respectively,accounting for about 18% of the average procurement price of technical projects. of Therefore,it is suggested that local governments should strengthen the pricing standards or cost accounting research,strengthen social supervision over the purchasing market of spatial planning services,and attach importance to local governments` spatial planning research institutions and talent teams.