The invention relates to a continuous reforming catalyst and a preparation method thereof. 100 wt.% of the catalyst comprises 0.01-2% of group IV metal component calculated by element, 0.01-1% of group VIII metal component calculated by element, 0.01-1% of group IB metal component calculated by element, 0.05-5% mixed rare earth component, 0.2-3% of halogen calculated by element and the balance of an alumina carrier. The catalyst is used for reforming reaction of naphtha, has high selectivity and low carbon deposit rate, good hydro-thermal stability and mechanical strength, and can meet the requirements of frequent regeneration of continuous reforming process.