Membrane phospholipids are important sources of intracellular signal messengers and phosphatidic acid (PA) can be catalyzed by phospholipase Ds (PLDs) in response to different stress signals. In this study, we used Bioinformatics to identify and analyze the gene members of PLD gene family in Chinese cabbage; and the qRTPCR to analyze the expression of 18 BrPLD genes in nonheading Chinese cabbage, in order to explore the response mechanism of BrPLD gene family in nonheading Chinese cabbage to high temperature stress. The results showed that: (1) a total of 18 PLD gene family members were identified. Two of them (BrPLD03 and BrPLD09) were replaced by PH/PX domain. Another gene(BrPLD12)lacked its Nterminal conservative domain and was replaced by signal peptide. (2) Depending on the domain of the encoding protein，18 BrPLD genes were classified into three subgroups: 15 C2BrPLD, 2 PH/PXBrPLD and 1 SPBrPLD；analysis of physicochemical properties of amino acids revealed that most of the proteins encoded by the gene family were acidic proteins; 18 genes were distributed on another 8 chromosomes except chromosomes 4 and 7, and showed nonuniform distribution. The deletion of Ca²⁺ ligand base of BrPLDs protein was also found.(3) Quantitative RTPCR analysis of nonheading Chinese cabbage under high temperature showed that BrPLD gene could respond to high temperature stress, and the expression of BrPLD gene changed significantly. The expression of BrPLD gene was different in heattolerant and heatsensitive varieties. (4) Prediction of cisresponse elements with different functions in BrPLD gene family revealed that all family genes contained lightrelated action elements, 9 genes contained cisresponse elements related to low temperature, 10 genes contained droughtrelated elements, all 18 genes did not predict heatstressrelated cisresponse elements. The results of this study have important reference value for further studying the mechanism of BrPLD gene family responding to high temperature stress.