This paper presents a method for system design and core device selection, a physical optical-mechanical system is developed for the realization of a rubidium potassium hybrid two-dimensional magneto-optical trap, and the system analysis and experimental verification are carried out. The results show that the light spot size of a long window cooling repumping beam is 13.10 mm, and the divergence angle is 0.39 mrad. The light spot size of a short window cooling repumping beam is 13.27 mm, and the divergence angle is 0.41 mrad. The light spot size of a buffer beam is 10.00 mm, and the divergence angle is 0.13 mrad. The focal spot size of a push beam at the differential pipeline is 2.02 mm. The root mean square radius and the geometric radius of the imaging system are both smaller than those of the Airy spot, and the modulation transfer function of the optical system is very close to the diffraction limit transfer function, indicating that the system has an excellent optical performance. The V-GROOVE design scheme of an optical fiber is proposed to let the four-way beams input optical port at the same time, and the overall physical optical-mechanical structure design also meets less parts used in an optical group, short total optical path, small volume, low power consumption, and light total weight, greatly improving the integration of all optical components and at the same time promoting atomic capture efficiency and the quality of the groups. The atomic loading rate of 1.89×10⁸ /s in the 3D-MOT is achieved.