The invention discloses a cat litter box. The cat litter box comprises a box body, wherein the box body consists of a bottom plate, a top plate, a front plate, a rear plate and two side plates; a dividing line is arranged in the middle of the front plate, a folding line is arranged on the top plate, the dividing line and the folding line are both perpendicular to the side plates, the dividing lineis connected with the two ends of the folding line through side lines, and the included angle between the side lines and the front plate is 45 degrees; a plurality of line holes are formed in the side lines equidistantly, a plurality of cat litter shake-off holes are formed above the dividing line, and line holes are formed in another three sides of a bending area. Firstly, during selling of thecat litter box, cat litter is packaged in the cat litter box, and when the cat litter box is used, the cat litter box is changed into a cat litter basin, so that an original cat litter basin is omitted in the whole process, and the cost for raising cats is reduced imperceptibly; meanwhile, since the cat litter box is disposable, the cat litter can be directly thrown away together with the cat litter box after being used, so that the work of cleaning and disinfecting the cat litter basin is avoided, and the burden of raising cats is reduced for cat lovers.