Machine body structure and floor fan

The machine body structure comprises a first component, a second component and a third component, the second component is tubular, and the top of the second component is arranged on the outer side of the bottom of the first component in a sliding and sleeving mode; the third part is provided with a connecting part and a guiding part, the guiding part is provided with a sliding groove extending vertically, and a sliding block is arranged in the sliding groove in a sliding mode; one of the connecting part and the sliding block is connected with the first component, and the other is connected with the second component. When the floor fan is used, an air feeder head and a base of the floor fan can be installed on the first component and the second component respectively, the first component can move up and down relative to the second component by arranging the second component to be arranged on the outer side of the first component in a sleeving mode, and the height of the air feeder head can be adjusted. By arra