The shrinkage and expansion of concrete are conducted for analyzing the cracks of the immersed tube. The aggregate species, admixture dosage and amount of cementing materials have great impacts on concrete shrinkage,. Tthe expansion of concrete is 150~250 με after immersed in water for 7 days, and the dry shrinkage of 150~200 με are measured after being pulled out from water and stored in dry the shrinkage room for 28 days. The amount of expansion and secondary dry shrinkage of the concreterelate little to the expansive agent.