The present invention relates to a particle fertilizer injection device which stores a particle fertilizer in a backpack type fertilizer tank, carries and transfers the same into the fertilization injection device, and injects the same in the ground or sprays the same on the soil, and more specifically, to a particle fertilizer injection device consisting of: a fertilizer supply pipe in a square shell arranged and formed on an upper end of a body unit； the body unit connected with the fertilizer supply pipe, installing an operation plate body which is in a square can body and forms cam bumps inside, installing an opening and closing plate and a division plate to be connected with the operation plate body and elevate from an exit and the bottom of the fertilizer supply pipe to upper and lower directions, and installing the opening and closing plate on an entrance of the fertilizer supply pipe； a handle protruding downwards from a lower surface at the center of the body unit； and a percussion device installed on a percussion device room which is formed on the handle, opening and closing the opening and closing plate on the entrance of the fertilizer supply pipe which is installed inside the body unit, rotating the operation plate body, and installing a recovering spring, wherein a hose is connected to a fertilizer input pipe combined on the exit of the upper end of the fertilizer supply pipe or a spray dish and the entrance of the fertilizer supply pipe, and is connected to a backpack type fertilizer tank, thereby injecting a fertilizer in the soil or spraying the same on the surface of the soil.본 발명은 입자로된 비료를 배낭형 비료통에 저장하여 짊어지고 비료주입기에 옮겨서 땅속으로 주입하거나 땅표면에 뿌릴 수 있도록 만들어진 입자 비료 주입기에 관한 것으로 보다 구체적인 것은, 4각관체로 되어 본체부 상단에 적층 형성되는 비료공급관과 비료공급관과 연접하며 4각통체로 되어 내부에 캠돌기를 형성한 작동판체가 장치되어 있고, 작동판체에 연동하도록 개폐판과 구획판이 비료공급관 출구와 바닥에서 상하방향으로 승강되도록 장치되고 비료공급관 입구에 개폐판이 장치된 본체부와 본체부의 중앙부 저면에서 하향돌출된 손잡이와, 손잡이에 형성된 격발기 장치실에 장치되어 그 작동간이 본체부 내측에 장치된 비료공급기의 입구측 개폐판을 개폐하고 작동판체를 회동시키며 복귀 스프링이 장치된 격
