According to the problems of irrational layout of multi-sensor and difficult adjustment of multi-axial parallelism for some T-type electro-optical turret, the influence of optical bench structure design with multi-sensor on multi-axial parallelism is analyzed. Structure layout principles and multi-axial parallelism adjustment methods of T-type electro-optical turrets are proposed. And the design ideas, layout principle and adjustment methods are applied to some T-type turret. Results show that the turret has the advantages of rational layout of multi-sensor, easy adjustment of multi-axial parallelism and higher precise multi-axial parallelism and stability.