A method for allocating paging resource to a mobile station, communicating with a communication network and having multiple subscriber identities, includes: allocating paging resource to the mobile station according to a first equipment identity and a first subscriber identity of the mobile station when the first equipment identity and the first subscriber identity are received for registration, and allocating the same paging resource to the mobile station when the first equipment identity and a second subscriber identity of the mobile station are received for registration, transmitting a paging message targeting at the first subscriber identity at a paging block with a first block index, and transmitting a paging message targeting at the second subscriber identity at a paging block with the first block index.