According to the need of a nuclear power station under construction, the preparation of C35, C50 self-compacting concrete(SCC) and their long age mechanics experiment were carried on. The test results between SCC and the vibrating concrete were compared. The test results indicated that the work ability and mechanical properties of SCC can satisfy the nuclear power station project. The long age mechanical properties were corresponding to the ones of vibrating concrete. The test results can be a reference of SCC research.