Based on concrete carbonation test methods available and common carbonation test equipments, this article designed and developed a new concrete carbonation test equipment. The device consists of a gas storage tank and many independent small carbonation chambers. With a compact structure, the device is small, simple and practical. With its advantages of not only improving the CO2 gas utilization, but also making full use of available space with the design of several smaller carbonation chambers, the device could carry out more carbonation tests without affecting their progresses. The device has a wide usage and promising future.