In this paper, the design of curve of grooved drum is researched, which deduced two types of circular cone curves analytic formula of grooved drum.

探讨了槽筒沟槽曲线的设计，导出了络圆锥筒子的二种类型的曲线解析式。

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The three dimensional design theory of the grooved drum trench curved surface includes: 1)the indirect and direct design of the bottom datum curve;

槽筒沟槽曲面三维设计理论包括：1）槽底基准曲线的间接设计与直接设计；

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The three dimensional design theory of the grooved drum trench curved surface includes: 1)the indirect and direct design of the bottom datum curve;

槽筒沟槽曲面三维设计理论包括：1）槽底基准曲线的间接设计与直接设计；

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