The present invention relates to a harmful pest and bacteria repellent, a soil conditioner, and methods for preparing the same, and more specifically, to a harmful pest and bacteria repellent having excellent pest and disease control functions, to a soil conditioner capable of improving and maintaining the continual self-renewing ability of the soil, and to methods of preparing the same. The method of preparing the harmful pest and bacteria repellent, comprises: a step in which leaves harvested from three or more living trees selected from a group consisting of Ginkgo biloba, Pinus densiflora, Chamaecyparis obtusa, Platycladus, Korean fir, Cryptomeria japonica, Abies holophylla, Pinus koraiensis, and bamboo are immersed in alcohol at room temperature for three or more days to produce an extract mixture； and a step in which the extract mixture is mixed with wood vinegar, and fermented at room temperature for three or more days to produce a harmful pest and bacteria repellent. Also, the method of preparing the soil conditioner comprises: a step in which a harmful pest and bacteria repellent is prepared； and a step in which the harmful pest and bacteria repellent is mixed with a microbial mixture containing fermentation microorganisms, antibacterial microorganisms, and photosynthetic microorganisms, and is fermented for one or more days. Accordingly, the present invention may improve environment modification function, recover acidified soils, and increase productivity of farmland. Also, the present invention provides a harmful pest and bacteria repellent having excellent pest and disease control functions and a method of preparing the same, and a soil conditioner capable of improving and maintaining the continual self-renewing ability of the soil and a method of preparing the same.본 발명은 유해충균기피제 및 농지개량제와 이들의 제조방법에 관한 것이다. 본 발명의 목적은 다양한 병해충에 대한 방지 및 예방 기능이 우수한 유해충균기피제 및 토양의 지속적인 자생능력을 향상시키며 유지하는 농지개량제와 그의 제조방법에 관한 것이다. 유해충균기피제의 제조방법에 있어서, 은행나무, 소나무, 편백나무, 측백나무, 구상나무, 삼나무
