Rice is one of the largest planting area and highest yield grain crops in China, which is the largest country in rice planting area of the world, so growing rice is of great significance to ensuring national security and social stability . At present, China’s rice planting area is nearly five hundred million acres, and the mode of raising and transplanting seedlings is mostly adopted. Seeding is a key step in rice planting, so its mechanization level directly affects the production capacity of rice. Now the mechanization level of raising seedlings is still low and only about 10% in China