The invention discloses a pentagonal liquid packing box provided with seven faces. The pentagonal liquid packing box comprises a box body, a plastic bag, a liquid outlet, a snap ring, a base and a sealing film. The plastic bag is arranged in the box body. The liquid outlet is fixed to the inclined face of the box body through the snap ring. The position, corresponding to the liquid outlet, of the plastic bag is provided with the base. The plastic bag is connected with the liquid outlet through the base. The middle portion of the base is of a hollow structure. The sealing film is arranged on a liquid flowing port of the liquid outlet and used for sealing liquid. The box body is a box body which is provided with a front face, a rear face, a left face, a right face, an upper face, a lower face and the inclined face by folding a whole paperboard along a folding line and performing pasting. The front face and the rear face of the box body are pentagons. The pentagonal liquid packing box is low in cost, easy to recycle, beneficial to environment protection and favorable for brand counterfeiting prevention, makes customers feel relieved, and cannot be easily damaged during stacking, content in the plastic bag can be completely poured out conveniently, the sealing performance is improved, and a good moistureproof effect is achieved.