A charging rule binding method performed by a session management network element, wherein the method comprises the steps of: • receiving (S 1201) a first policy and charging control, PCC, rule from a policy control network element, wherein the first PCC rule comprises: ∘ indication information, the indication information being used to indicate that the first PCC rule needs to be bound to a to be newly created separate quality of service, QoS, flow, wherein: ▪ the indication information is that the first PCC rule is a multi-level PCC rule, or ▪ the indication information indicates that QoS monitoring is required for a service corresponding to the first PCC rule, or ▪ the indication information is that a service corresponding to the first PCC rule is a time-sensitive service; • determining (S 1202) that the received first PCC rule needs to be bound to the to be newly created separate QoS flow, wherein the determining that the received first PCC rule needs to be bound to the to be newly created separate QoS flow comprises: ∘ determining, based on the indication information, that the received first PCC rule needs to be bound to the to be newly created separate QoS flow; • creating (S 1203) the separate QoS flow according to the received first PCC rule, and • binding (S 1203) the received first PCC rule to the created separate QoS flow, wherein the created separate QoS flow is only bound to the received first PCC rule. • receiving (S 1201) a first policy and charging control, PCC, rule from a policy control network element, wherein the first PCC rule comprises: ∘ indication information, the indication information being used to indicate that the first PCC rule needs to be bound to a to be newly created separate quality of service, QoS, flow, wherein: ▪ the indication information is that the first PCC rule is a multi-level PCC rule, or ▪ the indication information indicates that QoS monitoring is required for a service corresponding to the first PCC rule, or ▪ the indication information is that a service corresponding to the first PCC rule is a time-sensitive service; ∘ indication information, the indication information being used to indicate that the first PCC rule needs to be bound to a to be newly created separate quality of service, QoS, flow, wherein: ▪ the indication information is that the first PCC rule is a multi-level PCC rule, or ▪ the indication information indicates that QoS monitoring is required for a service corresponding to the first PCC rule, or ▪ the indication information is that a service corresponding to the first PCC rule is a time-sensitive service; ▪ the indication information is that the first PCC rule is a multi-level PCC rule, or ▪ the indication information indicates that QoS monitoring is required for a service corresponding to the first PCC rule, or ▪ the indication information is that a service corresponding to the first PCC rule is a time-sensitive service; • determining (S 1202) that the received first PCC rule needs to be bound to the to be newly created separate QoS flow, wherein the determining that the received first PCC rule needs to be bound to the to be newly created separate QoS flow comprises: ∘ determining, based on the indication information, that the received first PCC rule needs to be bound to the to be newly created separate QoS flow; ∘ determining, based on the indication information, that the received first PCC rule needs to be bound to the to be newly created separate QoS flow; • creating (S 1203) the separate QoS flow according to the received first PCC rule, and • binding (S 1203) the received first PCC rule to the created separate QoS flow, wherein the created separate QoS flow is only bound to the received first PCC rule.