The utility model discloses a mud pit with interior support, include bottom plate and the first side of locating the bottom plate top, the second side, third side and fourth side, first side, the second side, third side and fourth side are around fixed connection around the bottom plate and in proper order, first side, the second side, third side and fourth side all with the bottom plate perpendicular just respectively with bottom plate fixed connection, top between first side and the third side is equipped with first bracing piece, the second bracing piece, third bracing piece and fourth bracing piece, first bracing piece, the second bracing piece, third bracing piece and fourth bracing piece are connected with first side and third side simultaneously. The utility model provides a mud pitwith interior support, simple structure, convenient construction just can realize high -efficient construction, can carry out the secondary simultaneously and use and recycle to practice thrift the cost, advocated civilized construction.