Abstract: 【Objective】 This project aims to develop 1SZL-300 vibration deep subsoil preparation joint machine in order to meet the requirements of deep subsoil operation in Xinjiang dry farming land, break the bottom layer of plough, realize one-time joint operation of deep subsoil and land preparation, and reduce drag and consumption at the same time. 【Methods】 Solidworks and CAXA drawing software were used to design the structure of the whole machine and its key components, and the single research of vibration deep loose parts and the selection of vibration spring were carried out.The force of deep loose shovel into the soil and the principle of self-excited vibration drag reduction were analyzed. 【Results】 Field test of the prototype with or without spring vibration was carried out which verified that self-excited spring vibration could effectively reduce traction resistance.At the same time, the main operating performance indexes of the prototype under the condition of self-excited vibration were tested.The subsoiling depth was 382 mm, the stability coefficient of subsoiling depth was 96.8%, the soil swelling was 28.6%, the soil disturbance coefficient was 67.5%, and the soil fragmentation rate (within 10 cm of the surface) was 62.8%.The pure working hour productivity of the prototype was 2.2 hm²/h at an average working speed of 7.1 km/h. 【Conclusion】 The field experiments and tests indicated that the 1SZL-300 type vibratory subsoiling and soil preparation combined machine has a good working effect and all inspection indexes meet the design requirements.