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Because of the discrepancy of project types, the project progress curves present different characteristics. Studying project progress curves can reduce management risk of project and overall grasp the enforcement condition of the project. Combining project characteristic, this paper reaches 4 kinds of project progress curve patterns. If the front of the progress curve is concave, and its rear is protruding in the break point, it is named as S model. If its front is protruding and its rear is concave in the break point, it is named as the reverse side of S model. If the front and rear are concave in the break point, it is named as J model, and two half sections are both upward protruding, it is named as the reverse side of J model. Through a case study, it shows that application project progress curve model can better raise project management.