The utility model belongs to the field of simulation devices for flood prevention exercises, and particularly relates to a test device for inducing soil cracks during flood prevention exercises, whichcomprises a soil filling layer, a soil covering layer, a support platform and a thrust mechanism, the soil filling layer comprises a vertical side face, a slope face opposite to the vertical side face and a top end platform located at the tops of the vertical side face and the slope face. A steel plate is arranged on the vertical side surface of the filling layer; the thrust mechanism is arrangedon the other side of the steel plate and can evenly apply thrust in the horizontal direction to the soil filling layer through the steel plate. The steel plate and the soil filling layer can generatedisplacement in the horizontal direction under the action of the thrust mechanism; the soil covering layer is arranged on the top end platform and is made of cohesive soil; the supporting platform isburied in the soil covering layer and corresponds to the upper part of the thrust mechanism; the thrust mechanism can push the soil filling layer in the horizontal direction and can generate horizontal displacement relative to the soil covering layer. The soil crack generation process can be effectively simulated, and crack emergency rescue prevention in emergency rescue is facilitated.