Shrinkage crack is a common phenomenon in concrete. The driving forces of concrete shrinkage can be divided into two categories: temperature and humidity. For concrete floor, the main cause of shrinkage crack is plastic shrinkage and drying shrinkage. Shrinkage cracks appear on the concrete floor, which can easily cause the discomfort of perception and the suspicion of users' safety. Whether this type of floor slab is designed to meet the requirements of the design load, whether it can ensure the safe use and what kind of treatment measures should be taken is the key problem to be solved. In this paper, the load-carrying properties of the shrinkage crack floor slab are analyzed by field load test.