The coordinated efforts of government and market organizations can effectively guide farmers to adopt green agricultural production technologies.Based on 995 farmer survey data from Heilongjiang， Hubei and Guangxi provinces， this paper explores the impact of technology extension consistency on farmers’ adoption of soil testing and formula fertilization technology， and analyzes its mechanism from the perspective of trust. The findings are as follows： 1） The level of technology extension consistency has a positive impact on farmers’ adoption of green production technology. This conclusion still holds after addressing measurement errors through endogeneity treatment； 2） The impact of technology extension consistency on farmers’ adoption of testing soil formula and fertilization technology has obvious heterogeneity among different farmer groups. Compared with farmers in the elderly group， the impact of technology extension consistency on young farmers is more significant； 3） The mechanism analysis reveals that when both agricultural supply stores and agricultural extension stations strongly encourage the use of green agricultural technologies—indicating a high level of promotion consistency—farmers exhibit a higher level of trust in the technology， which in turn increases their likelihood of adopting it. Therefore， improve the coordinated technology extension mechanism， enhance farmers’ trust in agricultural testing soil formula and fertilization technology， and develop effective incentive measures based on farmers’ characteristics， which is an effective way to enable farmers to adopt testing soil formula and fertilization technology.