The utility model provides a that simulates different filler cracks moves water slip casting test device, belongs to the geotechnical engineering field, and the device is moving diffusion law research of bentonite thick liquid and the experimental study of grouting for water blocking effect in the sand filled opening under the water condition. Carrying out slip casting under the good condition of parameter setting such as head pressure, water injection flow, grouting pressure, having laid purpose -made rubber pad at the test model incasement, corresponding aperture position has set up slip casting pipe and pressure measuring equipment, and water injection device, slip casting device and liquid waste collection device have been connected to its outer end, carries out the thick liquid configuration, carry out the water injection to the device after, carry out slip casting again. This device has carried out one -dimensional slip casting analogue test to pressure distribution condition when this has studied under the seepage flow condition in the filled opening slip casting and along with the change rule of thick liquid diffusion has improved the efficiency of slip casting.