The invention discloses a parameterized level set structure topological optimization method based on an implicit B-spline. The method comprises the following steps: (1) selecting a design domain according to actual use requirements; (2) parameterizing the level set function by using an implicit B-spline curve; (3) applying a displacement constraint condition and a load according to an actual working condition; (4) giving an initial level set value of each unit node; (5) calculating a volume fraction according to the phi value of the node; (6) performing finite element analysis on the structureobtained in the previous step to obtain a response quantity which can be used for velocity field calculation; updating a level set function, and performing level set function surface fitting throughthe implicit B-spline curve; (7) judging iterative convergence; (8) processing an optimization result; and (9) outputting an optimization result. According to the parameterized level set method takingthe linear B-spline as the primary function, a correct optimization result can be obtained, and the calculation speed is higher, especially in large finite element calculation.