The excessive number of injections of cementing solution required for MICP limits practical engineering application . In order to reduce the number of injections and improve the efficiency of the cementing process, an enhancement method was investigated in this study in which aluminum ion flocculant was added to the cementing solution to enhance the curing rate and effect of MICP. Experiments were carried out on MICP-reinforced sand columns, and the influence of different concentrations of AlCl3?6H2O to the cementing solution on the reinforcement effect was studied. In the aqueous solution test, the changes of precipitation and solution pH under different solution conditions were observed, and the effects of the aluminum ion flocculant on the composition and morphology of the deposited calcium carbonate were investigated by XRD and SEM tests. The results show that, compared with the control group of conventional methods, after adding an appropriate amount of aluminum ion flocculant into the cementing solution, the proposed method resulted in the experimental sand column being reinforced after 3 treatments of the cementing solution. The unconfined compressive strength reaches 1.7Mpa after 5 treatments of the cementing solution, compared to 10 treatments using the conventional method.