Sinkhole structures are crucial for the construction of urban water pipelines. The unevenness of the underground geological conditions may create stress concentration points within the sinkhole structure, which may lead to the formation of cracks. Cracks may allow water to infiltrate into the sinkhole structure and reduce its overall strength and stiffness. This paper investigates the influence of continuous and embedded cell types on seepage parameters in cracked concrete by examining the effects of three factors: permeability coefficient ratio K, grid size ratio R, and crack thickness, on the seepage coefficient. The study results show that the change of permeability coefficient ratio K has less impact on the seepage velocity of the internal matrix as the crack penetrates from the outside to the inside of the sinkhole; when K = 100,000 is chosen, a stable seepage field is obtained, reflecting the difference in permeability coefficients of the crack and the concrete; the seepage velocity at the corner point of the crack changes more significantly as the grid size ratio R increases from 20 to 50, and when it increases further, the effect of increasing the ratio on the seepage velocity is relatively small after exceeding a certain threshold; the penetrating crack separates the matrix, and the low permeability of the matrix isolates the seepage flow in the matrix, so the farther the reference point is from the crack, the smaller the influence on the seepage field. The calculation results demonstrate the feasibility of using the embedded unit instead of the continuous unit as the crack unit, and the form of embedded unit can reduce the modeling difficulty of the cracked concrete model.