The task of verifying the operational task temporal collaboration consistency in military planning is researched based on the point-graph (PG), and a method based on PG to cope with temporal reasoning is designed. Build a PG model to describe operational task temporal collaboration, verify the operational task temporal by point-unification, point-folding and point-time calculation, and a consistency verifying algorithm is given. Finally, an example is present to illustrate the feasibility and effectiveness of above method.