The invention relates to a wireless sensor network node deployment method based on CFD (computational fluid dynamics) and a clustering algorithm and belongs to the technical field of wireless sensor network deployment and building energy conservation. The method comprises the following steps: step 1, acquiring environmental parameters from an actual building environment with experimental and research methods; step 2, constructing an environmental information distribution cloud picture model of building space on the basis of a CFD related technology; step 3, clustering data of the environmental information distribution cloud picture model of the building space on the basis of the clustering algorithm; step 4, defining hierarchy constraints of sensibility by combining mathematical analysis; step 5, determining a final node deployment strategy with sensitivity analysis. A perception layer layout strategy is optimized by fusing CFD, the clustering algorithm, sensitivity analysis and other technical methods, perception layer information of the building environment can be reflected accurately with the method, and a positive effect is produced for stability and low energy consumption of an environmental control system.