The invention discloses an anti-cracking method for a toe board of a panel concrete rock-fill dam. The anti-cracking method comprises the following steps: first, pouring foundation leveling concrete on an excavated toe board foundation; then brushing asphalt grease to the foundation leveling concrete; then pouring the toe board; then inserting an anchor rod connecting the toe board, the foundationleveling concrete and the toe board foundation onto the toe board; then constructing an impervious curtain under the toe board; and finally, spraying insulating and moisturizing polyurethane to the outer side of the toe board to finish the whole construction. The method avoids cracks caused by constraint of the toe board foundation effectively when the toe board is poured, so that the toe board structure meets the impervious and safe and stable demands.