The utility model relates to a liquid delivery structure of a crop additive, which comprises a bag body filled with soil additive particles； the bag body has a permeable structure； a film which is combined with the bag body and is wrapped on the outside of the bag body.When the dropping structure is put into the aqueous solution, the membrane can be hydrolyzed. By the permeable structure, the aqueous solution can smoothly enter the bag body, dissolve the particles in the bag body, and the bag body expands from the inside, and the internal pressure formed by the expansion releases the solution of the soil additive from the permeable structure, so that the aqueous solution immersed in the dropping structure becomes the diluent of the soil additive.一種農作物添加劑之液體投放結構，包括：一袋體，該袋體中填裝土壤添加物微粒；該袋體具有滲透結構；一薄膜，結合於該袋體並包覆於該袋體外部。將投放結構投放於水溶液中，薄膜可水解，藉由該滲透結構使水溶液可以順利的進入該袋體內，將該袋體中的微粒溶解，該袋體從內部膨脹，而膨脹形成的內壓將土壤添加物之溶解液從該滲透結構向外釋出，使浸泡投放結構的水溶液成為土壤添加物稀釋液。
