The layer bonding performance is very vital for the utilization of hydraulic engineered cementitious composites (HECC). The layer bonding performance involves the interlayer performance of HECC and HECC, and the layer performance of HECC and normal mortar (NM). The bonding strength of the untreated layer is very low, only half of that of the whole specimen without layer. Based on the fact, this article proposes three different improvement measures to improve the bonding performance of the layers: pickling surface, using interface agents, and using high-speed stirring devices to stir layer. The layer bonding performance is tested by the layer flexural strength. The test results show that: muriatic acid and acetic acid pickling can improve the interlayer bonding performance by 10% to 30%, while citric acid will reduce it by more than 90%; different interface agents have different improvement effects, among which The epoxy resin mortar interface agent has the most obvious improvement effect, reaching 44.9%; high-speed stirring of the layer eliminates the layer in a certain sense, improving the layer bonding performance by 349%, and has the most obvious effect among all methods.