Green toughness cementitious composites(GTCC) is one kind of polyvinlyalcohol(PVA) fiberreinforced tailing sand engineered cementitious composites, which was developed by engineered cementitious composites(ECC) technology. The composite replaces natural fine aggregate with a large proportion of tailing sand, which has the characteristics of economy, environmental protection and ductility. At present, the research on this composite material is mainly confined to the aspects of product preparation, mechanical properties and durability. The research on the selfhealing property of GTCC cracks has not been reported yet. In order to explore the selfhealing properties of the composites, three groups of cube specimens containing 50% tailings sand and 50% natural sand with different waterbinder ratios were designed， the selfhealing properties of GTCC were studied by compressive strength recovery method. Through the compressive strength experiment, the influences of damage age, selfhealing age, curing condition and cycles of wetdry conditioning on the selfhealing effect of the new material were discussed. The results show that the earlier the composite material is damaged, the better the selfhealing effect is. The selfhealing effect increases with the increase of selfhealing age, but the later growth rate is weaker than the early growth rate. The wetdry conditioning is more conducive to its selfhealing than other environment. Selfhealing occurrs primarily before the 21st wetdry cycles.