As people pay more and more attention to environmental protection and their own health, the demand for the development of pollution-free vegetables is getting higher and higher. It is a development direction to vigorously promote biological pesticides. Biological pesticides are used to combine insecticide, bactericidal, anti-viral and growth-promoting functions. They are non-toxic to humans, plants and livestock. After being applied, insect pests rapidly intoxicate and quickly die. There are no drug residues on crops. In recent years, Longyan City, Fujian Province has established pollution-free production demonstration townships and demonstration bases in seven townships (towns) such as Xinluo District, Fuping City, and Yongding County, and has applied and promoted biological pesticides and achieved certain results. However, on the whole, the current proportion of biopesticides is not high. It is understood that the national market share of biological pesticides accounted for only 1.8% of all pesticides, the formation of industrial scale of biological pesticides is not on the 10 species, and there are more than 2,000 kinds of chemical pesticides. On the other hand, with the continuous development of science, chemical pesticides have also begun to evade weaknesses and move toward high efficiency, low toxicity, and low residue. Chemical pesticides will also exist as a dominant position for quite a long period of history. Relevant experts believe that there are still many problems in the development of biological pesticides. One is that the insecticide spectrum is narrow, and some biological pesticides can only deal with one or two pests. The second is the slow insecticide rate. Third, biological pesticides have poor stability and are difficult to preserve. In particular, products that use living microorganisms as their active ingredient have a rapid decline in biological activity and a short product quality assurance period. These factors constrain the development of biological pesticides to some extent. In addition, the use of biological pesticides and fertilizers and pesticides are also different, biological pesticides are technically strong, farmers need to use a concept of transition and technological adaptation process. However, Liu Bo said that because the use of biological pesticides is less toxic to crops and reduces the direct harm to humans, its development prospects are optimistic. The key to the development of biological pesticides in the future is to do four things. The first is to increase the varieties of biological pesticides and make them industrialized; the second is to increase propaganda, so that the majority of farmers to grasp the biological pesticides insecticide mechanism and the use of skills, improve the quality of farmers' science and technology, expand the coverage of promotion and application; Third, the government should Give certain policy support, introduce relevant laws and regulations, promote the promotion and use of biological pesticides, and must also use scientific and technological means to reduce the production costs of biological pesticides; Fourth, improve the detection system of pollution-free agricultural products as soon as possible, so that genuine people receive benefits.