This thesis includes three parts. In the first part, 23 kinds of film-forming materials, 60 kinds of assistants, 15 kinds of pesticides and fungicides and 17 kinds of plant growth regulators and micro nutrients were used as tested materials to prepare soaking-suitable rice seed coating agent(Hongli rice seed coating agent).In the second part, rice seeds were coated to explore the mechanism of slow-release, entering seedling and content change hi seedlings of active ingredients in the seed coating...