The utility model provides a combined-type high-pressure test cabin, and the cabin comprises a test cabin body and a cabin cover which cooperates with the cabin body. The cabin is divided into an outer pressure cabin and an inner pressure cabin. The outer and inner pressure cabins are respectively an independent cabin body which consists of a cabin body and a cabin cover. The inner pressure cabin body is embedded in the outer pressure cabin body through a support. The test cabin provided by the utility model employs a mode of combined embedding, can employ the outer pressure cabins independently according to the needs, can meet the testing requirements of larger parts, or is provided with a plurality of inner pressure cabin in an embedded manner, can meet the requirements of a higher pressure, and can achieve the testing of equipment and environments in different pressure levels. A sealed cover and the inner pressure cabin are more convenient in disassembly and assembly. The test cabin can be disassembled and assembled repeatedly for application, and is good in prospect of application.