The invention discloses a satellite network routing method with a load sensing buffer memory limitation and interrupted connection, and mainly at solves the problems that a minimal-time-delay route cannot be found accurately in the satellite network with buffer memory limitation and interrupted connection in the prior art due to loss of available buffer memory size information of loads and nodes of a queuing service of a contact link. The method is realized by the steps that 1) a node route list of the whole network is initialized, and a contact plan is synchronized in the whole network; 2) route calculation is started when a node receives a Bundle packet; 3) a link cost is calculated according to the contact plan; 4) a node of minimal link cost is marked till a target node is obtained; and 5) the Bundle packet is forwarded according to the minimal link cost, and the route list of a present node is updated, and routing information of the whole network is synchronized. According to the invention, the minimal-time-delay route of the satellite network with buffer memory limitation and interrupted connection can be calculated accurately, the data delivery rate is improved, and end-to-end time delay of data is reduced; and the routing method can be applied to the satellite network in which the load senses buffer memory limitation and interrupted connection.