The embodiment of the invention provides a path determining method and device for a software defined network (SDN), computer equipment and a storage medium, which are applied to a controller of an SDN network. The method comprises the following steps: receiving a target request; adding a source node of the target request into an empty node set; calculating time delay values from nodes outside a current node set to the source node in the SDN network according to position relationships between the nodes outside the current node set and nodes in the current node set; selecting a target node from the nodes outside the current node set, and adding the target node into the current node set; judging whether identification information of the target node is matched with identification information of a destination node or not; if so, determining a path from the source node to the target node as a target path of the target request; otherwise, continually calculating the time delay values from the nodes outside the current node set to the source node in the SDN network. Through the scheme, the target path of which a time delay value and a bandwidth are satisfied at the same time is selected for the target request, so that the network link utilization ratio is increased.