The invention discloses a mobile ad-hoc network data transmission method based on neighbour strong connectivity. The method comprises the steps of judging connectivity probabilities among nodes within certain time interval through position information and speed information of a mobile ad-hoc network and establishing a probability graph network model; storing neighbour node sets and the connectivity probabilities among the neighbour nodes through utilization of the probability graph network model established in the previous step, discovering routes through hop count and route connectivity rates according to a route discovery algorithm MDSR, and returning a plurality of routes; clustering node sets based on the neighbour connectivity according to rapid moving features of the nodes in the mobile ad-hoc network, screening the routes in the plurality of discovered routes sectionally according to clusters, carrying out route section according to the connectivity probabilities among the nodes and the connectivity between the nodes and the neighbours, combining the selected sectional routes to form a complete route, and finishing forwarding the data. According to the method, the data transmission delay is reduced, and the data forwarding reliability is improved.