The article mainly deals with the current development of rice paddy crop-planting mechanization in Guangxi as well as some relevant factors restraining the development.

Structural optimization of waterway system of irrigating-sowing machine;

A new seeding technique of irrigating-sowing machine was studied,it could ensure seeds and water to flow into seedbed furrow together in the same level.

This paper discussed some important problems of main kinds of the irrigating-sowing machines that were used in several dry regions of china existing in performance, operating efficiency and special requests of non-tillage irrigating-sowing, and through analyzed the root causes of these problems, some technique methods were put forward for solving the problems.

Discussed the actuality and problem of rice planting mechanization in Nanjing, analyzed feasibility about the application of rice direct seeding technology in Nanjing, put forward suggestion, development direction and mode.

This paper introduced the actuality of rice planting mechanization in the city of Huainan, analyzed the adaptability of this technology and it s development superiority & restrict factors, put forward countermeasures and development consideration.