Through investigations, the author found that excessive application of chemicals was common in the production of japonica rice in northern Jiangsu, at the same time, put forwarded the technical scheme of reducing fertilizer and pesticide. The scheme include: (1) selecting suitable varieties; (2) cultivating strong seedlings with long seedling age; (3) popularizing the application of fertilizer before transplanting; (3) returning wheat straw to the field; (4) shallow ploughing and base fertilizer leakage proof; (5) early transplanting and increased line spacing; (6) aerated irrigation and high-quality roasted fields; (7) reducing and increasing efficiency of tiller fertilizer and applying enough panicle fertilizer; (8) comprehensive prevention and control. Under the condition that chemical inputs are reduced by 28%~42%, this scheme of japonica rice in northern Jiangsu can also ensure that the number of panicles is sufficient, the population quality is good, and the diseases, pests and weeds can be effectively prevented and controlled, so as to achieve the goal of “chemical input greatly reduced, rice yield not reduced, control effect not reduced, safety and high quality rice”.