The bedrock in the Zhejiang region is largely covered by Mesozoic volcanic rocks, which makes it difficult to understand the deep structures in the Earths crust. In this paper, based on synthetic data processing with the multi- scale wavelet decomposition of gravity and aeromagnetic anomaly data, we find the 3D crustal structures at different depths in the crust of Zhejiang Province, and show the tectonic patterns of the upper, middle and lower crusts, respectively. According to the multi- scale decomposition results, the upper crust of Zhejiang Province can be subdivided into six tectonic units as follows: ① the northern Zhejiang belt belongs to the South Yangzi; ② the Jiangshan- Shaoxing collision and terrain amalgamation belt; ③ the northern edge blocks of the Huaxia ancient land; ④ the edge- belt of the Lishui- Yuyao subduction zone; ⑤ Paleozoic, the Jurassic- to- Cretaceous volcanic belt of eastern Zhejiang Province; ⑥ the Hangjia block. Among the six tectonic units of the upper crust, the Jiangshan- Shaoxing belt, the Zhejiang East volcanic rock belt, and the Hangjia block have high density and strong magnetic properties, while the others have low density properties,related to their Andes- type subduction dynamics that occurred in their history.In the lower crust, the six tectonic units in the studied area have to be combined into three tectonic blocks with different density/magnetic properties. The tectonic patterns of the middle and lower crust in Zhejiang Province was mainly influenced by the eastward retreat of the western Pacific subduction zones.