The invention provides a target non-escape area reliable prediction method adapting to cooperative task planning. The target non-escape area reliable prediction method is characterized by comprising the following steps: 1, selecting at least two feature points in a missile flight envelope; 2, setting the spatial distribution of a target in the airspace according to the position and speed of the target; 3, establishing a target non-escape area by taking the feature point in the missile flight envelope as a starting point and the aim as an end point, and establishing a mapping relationship between the current state of a missile, namely the initial state of the feature point, and the target non-escape area; and 4, obtaining the target non-escape area according to the mapping relationship between the current state of the missile and the target non-escape area, establishing a target escape cost model, calculating the current target escape cost, and predicting the missile interception capability. According to the target non-escape area reliable prediction method adapting to cooperative task planning, a non-escape area model of the missile attack target is established according to the flight state information of the missile and the target, the target escape cost is effectively predicted, and support is provided for missile cooperative task planning.