Small excavators are typically used for the following purposes:

1. Construction site: used for excavating soil, cleaning the ground, excavating foundation pits, transporting building materials, etc.

2. Farmland work: used for construction of irrigation channels, land preparation, excavation of drainage ditches and other agricultural work.

3. Road construction: used for road construction work such as excavating roadbeds, cleaning road slopes, and laying pipelines.

4. Landscape greening: used for digging plant pits, organizing flower beds, cleaning branches and leaves, and other landscaping work.

5. Water conservancy engineering: used for dredging, building dams, excavating channels and other water conservancy engineering construction.

Overall, small excavators are suitable for engineering projects that require excavation, handling, and leveling of land.