The present disclosure discloses a route determining method, including: receiving a first flow entry which includes a first route mapping relationship and a first load ratio with respect to a full load capacity of each service node; receiving a second flow entry which includes a second route mapping relationship, a second load ratio with respect to a full load capacity of each service node, and a start time of the second flow entry; receiving a first packet of a first service flow; determining, according to a service chain identifier included in the first packet, that the first service flow is a first type of service flow; determining whether a time corresponding to a timestamp precedes the start time of the second flow entry; and if so, determining a service node for receiving the first packet according to the first flow entry; if not, determining a service node for receiving the first packet according to the second flow entry.