Abstract: To address the problem that deepwater platform operations have to preferably choose navigation avoidance routes in the case of typhoon, the finite element method is used to build a mechanical model about the towing process of riser in which the roles of waves and currents are simplified. The relation between the lengths of soft and hard suspension risers and the allowable maximum velocity is worked out and three anti-typhoon measures for deepwater drilling platform are developed. The model to calculate the most unfavorable positions of platform in the case of typhoon is provided and the preferred anti-typhoon measures are identified with a floating drilling platform as an example. The mechanical analysis shows that: the positions of riser under the maximum stress and the maximum bending moment appear offshore; when the number of floating blocks is increased, the maximum angle at the top of the riser will limit the maximum navigational speed of the platform; when the riser is short, hard suspension will enable faster speed; otherwise, soft suspension will enable the maximum allowable speed. The anti-typhoon measures suggest that: the computational model based on the most unfavorable positions can quickly calculate the appropriate anti-typhoon position and measures and the preferred navigation route can be selected according to the safety and re-operation.