The invention relates to the technical field of crop fertilizers, in particular to a slow-release fertilizer special for saline-alkali soil peanuts. The slow-release fertilizer special for saline-alkali soil peanuts comprises urea, ferrous sulfate, potassium sulphate, monopotassium phosphate, copper sulfate, single superphosphate, fermentation dung of beasts and birds, sulphur and sodium silicate. A manufacturing method includes the following steps that dung of beasts and birds such as the chickens are mixed in a proportion, undergoes fermentation, is dried, smashed and filled with the urea, the ferrous sulfate, the potassium sulphate, the monopotassium phosphate, the copper sulfate, the single superphosphate, the sulphur and the sodium silicate, smashed and evenly stirred. Particles are manufactured and dried to obtain the slow-release fertilizer. Disposable fertilization can continuously adjust the soil ph, damage to the saline ions is reduced and the nutritional requirement of peanuts in different growth periods can be met. The organic matter such as chicken dung is used for enriching the nutrition component of the soil. Organic dung of the chickens and the beasts and commonly-used inorganic fertilizers in production are used as raw materials and do not pollute the environment and the crops, wherein the organic dung of the chickens and the beasts is fermented thoroughly. Meanwhile, the formulation is reasonable, the nutrition is balanced, the use effect is better, the utilization rate of the fertilizer can be obviously improved and the yield and quality of the peanuts are improved.