Abstract: To explore the effects of a kind of new soil conditioner（ named by Tebeigai，made from oyster shell powder） on peanut yield and soil acidification in red soil，field experiment was conducted，which included four rates of soil conditioner（ 0，750，1 500 and 2 250 kg/hm2），then，peanut yield，yield components，soil chemical properties were analyzed. The results showed that： the peanut yield in application of soil conditioner increased than CK（ no soil conditioner） by 10.2%-23.8%， their plant height，grain number and 100-grain weight were improved significantly. Meanwhile，compared with CK，soil available N，P and K of soil conditioner treatments increased by 21.65%-118.1%，118.1%-74.1% and 22.6%-74.1%；while the soil pH and exchange calcium of soil conditioner treamnets increased significantly than CK by 0.18-0.33 units（ 4.0%-7.3%） and 12.9%-18.8%，and exchange hydrogen and aluminum contents reduced than CK by 19.6%-62.5% and 34.7% 84.2%，respectively. Therefore，this new type of soil conditioner could attain higher yield of peanut in red soil，improve soil available nutrient and reduce soil acidification.