A slow-release organic fertilizer for plantation of kiwi is prepared from the following raw materials, by weight, 8-10 parts of perlite, 10-12 parts of rotten fruit and vegetable, 8-9 parts of chicken manure, 14-16 parts of attapulgite, 3-4 parts of EM biological strain, 2-3 parts of agar powder, 6-8 parts of dry pond sludge, 4-5 parts of magnesium sulfate, 4-6 parts of potassium permanganate, 3-5 parts of iron chloride, 6-8 parts of sodium humate, 8-10 parts of ammonium bicarbonate, 4-5 parts of an auxiliary agent and a proper amount of water. The organic fertilizer provided by the invention is a specially-designed fertilizer for plantation of kiwi. By compounding of perlite, the organic fertilizer with an adsorption function is prepared. The fertilizer is firstly ground to a sand shape and then is coated with a layer of agar membrane. Then, elements can effectively be absorbed, use of the fertilizer is minimized and soil hardening is prevented. By addition of magnesium sulfate, potassium permanganate, iron chloride, sodium humate and the like, contents of magnesium, potassium, iron and the like are supplemented for the fertilizer. By addition of acid, soil acidity can be improved. By the use of the organic fertilizer, abuse of fertilizer is minimized, and consumption of energy is also reduced.