Y-type molecular sieve containing phosphorus and rare earth and preparation method thereof

The invention discloses a Y-type molecular sieve containing phosphorus and rare earth and a preparation method of the Y-type molecular sieve. The preparation method comprises the following steps: forming a NaY molecular sieve filter cake layer from slurry of a NaY molecular sieve; mixing and pulping the NaY molecular sieve, phosphorus-containing filtrate and a solution of rare earth salt, and forming an RE-NaY molecular sieve filter cake layer on the NaY molecular sieve filter cake layer to obtain a composite filter cake; carrying out ion exchange, washing and roasting on a phosphate solution and the composite filter cake obtained in the step 2 to obtain a Y-type molecular sieve containing phosphorus and rare earth; the ion exchange and the water washing are performed at least once. The preparation method of the Y-type molecular sieve containing phosphorus and rare earth can solve the problems of low rare earth utilization rate and serious phosphorus pollution in the production process of the Y-type molecular