Abstract: In order to explore the application effect of side-deep fertilization technology in rice mechanical transplanting based on agricultural machinery agronomy fusion,the comparative experiment of slow-release fertilizer application effect of different types was carried out,and the suitable types of slow-release fertilizer were screened,furthermore,the effect of side-deep fertilization with different amounts of fertilizer on rice population yield was studied.The results showed that the effect of shunaishi slow-release fertilizer was the best,and when the amount of fertilizer was 480 kg/hm~2,the yield was increased by 10.0%,the economic profit was increased by 76.2%,and the fertilization time was saved 3 times,then the effect of saving fertilizer,labor and increasing yield can be realized.