The present invention provides a catalyst continuous reducing apparatus which comprises at least one storage tank, a reducing gas conveying pipeline, a rotary reactor, a gas-solid separator and a receiving tank. The present invention also provides a catalyst continuous reducing method comprising: (a) mixing a to-be-reduced catalyst with a reducing gas to obtain a first mixed material; (b) introducing the first mixed material into the rotary reactor for reduction under rotary conditions to obtain a second mixed material containing a reduced product; (c) leading the second mixed material out from a material outlet to the gas-solid separator for gas-solid separation; and leading a separated solid, by a solid material end of the gas-solid separator, into the receiving tank, and mixing the separated solid with a liquid medium in the receiving tank. The catalyst continuous reducing apparatus can achieve continuous reduction of the catalyst, the operation is simple, and the catalyst continuous reducing apparatus can avoid solid catalyst attrition in the reduction process so as to reduce content of a final liquid product.