Construction dust generates from construction sites and construction activities such as housing construction projects and municipal infrastructure projects, which is one of the main sources of atmospheric particulate matter. Its massive release and dust fall have significant harm to buildings, equipment, personnel and so on. At present, there are relatively few measurement data on the characteristics of dust emission on the surface of construction sites, and the attention on the dynamic change of dust concentration or emission amount during fluid release is far from enough. Therefore, based on the dust release mechanism and field wind tunnel structure, a new portable surface dust release measuring device is designed and developed in this paper. The instrument has the advantages of small size, easy transportation, easy operation and low cost, and the test results show that it has high accuracy, and can be applied to the complex terrain that is difficult to reach the wind tunnel. It is suitable for analyzing and studying the dust emission capacity of the surface of different construction sites and the corresponding physical mechanism.