Electric spindle and machine tool

The invention provides an electric spindle and a machine tool, the electric spindle comprises a shaft core, a flange, a bearing and a displacement sensor, the bearing sleeves the periphery of the shaft core and is relatively close to the axial front end of the shaft core, the flange is located on the periphery of the shaft core, the flange comprises a first part, a second part and a third part, and the second part is located on the first part. The first part is located at one axial end of an outer ring of the bearing and abuts against the outer ring, the second part is connected to the axial end, away from the outer ring, of the first part, and at least part of the third part is structurally connected to the periphery of the second part. At least part of the structure of the axial end, away from the first part, of the second part is recessed to form a first groove, and at least part of the structure of the displacement sensor is arranged in the first groove. According to the invention, the technical problem t