The invention relates to the technical field of articles for pet garbage cleaning, in particular to cat litter for pets and a preparation method of the cat litter. The cat litter for pets comprises the following ingredients in parts by weight: 50 to 100 parts of paper plant sludge, 0 to 50 parts of paper pulp, 3 to 10 parts of bonding agents, 3 to 5 parts of paper dust and 0 to 5 parts of auxiliary agents, wherein the paper fiber length in the paper pulp is 1.5 to 3mm, and the paper fiber length in the paper dust is 0.5 to 1.5mm. The cat litter for pets has the advantages that the specific gravity is light, the adsorption capacity is high, the caking effect is good, the processing is easy, the environment protection is excellent, and in addition, the cost is low. The flow process of the preparation process of the cat litter is continuous, the time is saved, during the raw material stirring homogenization and granulation, the process is mild, and the operation is easy.