Abstract：Volatile organic compounds （VOCs） are important precursors of atmospheric O3. O3 pollution events frequently occurred in Pearl River Delta （PRD） region during summer and autumn. Several VOCs observational studies have been conducted in urban areas in PRD， while the related studies focusing on background regions are limited. In this study， based on VOCs measurements simultaneously taken at multiple sites in PRD background region of Dapeng Peninsula in Shenzhen， we characterized VOCs pollution in this background area. The results showed the average volume concentration of total VOCs （TVOCs） was 27.4×10-9 during sampling period with a higher level in west and lower level in east. The most dominated species were oxygenated volatile organic compounds （OVOCs）， alkanes and halo- hydrocarbons， accounting for 80.4% in TVOCs in total. OVOCs， aromatics and alkenes were three most important components for ozone formation potential （OFP） with 86.5×10-9 in total and ·OH loss rate （L·OH） with 8.6 s-1 in total. Among them， highly active species such as Acetaldehyde， isoprene， propionaldehyde， n-Butanal and m/p-xylene should attract more attention. Affected by regional transmission from northeast， the air mass in PRD was relatively aged. Five main sources for VOCs were vehicle emissions， solvents and other industrial emissions， secondary formation， biomass burning and biogenic emissions. Our study suggests that it is necessary to take comprehensive prevent and control measures on a regional scale for effectively reducing ozone pollution in the PRD region.