Mould device for precast concrete unit

The utility model relates to a mould device for a precast concrete unit. By the adoption of the mould device for the precast concrete unit, the quality and the strength of the precast concrete unit can be improved. The mould device for the precast concrete unit comprises a rectangular inner cavity defined by a plurality of surrounding plates. A plurality of vertical plates are arranged in the inner cavity in parallel at equal intervals. The inner cavity is divided by the vertical plates into a plurality of identical mould chambers. The two surrounding plates perpendicular to the length direction of each mould chamber are respectively provided with first through holes correspondingly, the first through holes are arranged at equal intervals in the height direction of each mould chamber, so that a plurality of first through hole groups are formed, the first through hole groups are arranged at equal intervals in the width direction of each mould chamber, each first through hole group is communicated with the corr