The advantages of the rotary tiller mainly include the following points:

1. Strong soil-crushing ability: The rotary tiller can break up large soil clumps into fine particles, enhancing soil levelness and fineness, which is beneficial for crop growth.

2. Multi-functional: The rotary tiller can perform various agricultural tasks such as plowing, soil breaking, mixing, and covering, which is conducive to improving agricultural production efficiency.

3. Time and Effort-Saving: The rotary tiller is easy to operate and greatly reduces the physical labor of farmers, enhancing work efficiency.

4. Improve Soil Aeration: The rotary tiller helps to structure the soil, thereby enhancing its aeration and water permeability.

5. Enhance Soil Fertility: The rotary tiller effectively mixes soil and fertilizer, ensuring even distribution throughout the soil, which promotes plant absorption and growth.