Among 19 reasonable followed-by crops of paddy rice, tomato, eggplant, cucumber and lettuce could be classified into the acute susceptible, water melon, carrot, kidneybean and tobacco into the chronic susceptible, red-papper, onion, garlic, spinach, chinese cabbage, cabbage, radish, crown-daisy and barley into the relative tolerant group, respectively. Even the susceptible crops showed different phytotoxic response to quinclorac by differing of seedling growth stages. Comparing of g followed-by species to 7 different paddy herbicides(include of quinclorac) at 120-180 days after soil application, the growth of tomato, garlic, rye-grass, and cucumber could be negatively influenced by one of other several commercialized herbicides than quinclorac, and tomato by quinclorac was the most serious among others.