Aiming at the design difficulty of miniaturized laser transmitting-receiving detection system, a solution for large field of view, miniaturization was proposed. Laser chip and driving circuit were integrated on aluminum nitride substrate, which achieved the purpose of improving performance and dimension compression. According to theoretical calculation and ZEMAX optical simulation, the optical fiber, free surface array cylindrical lens and spherical cylindrical lens were used to realize shaping and convergence of light, which reduced the axial dimension. A small size receiving module with amplified circuit was designed. The electromagnetic interference caused by the pulse current was analyzed in the miniaturized system, further more, a variety of electromagnetic compatibility measures were adopted to shield electromagnetic interference. At last, the initial prototype was made and the experiment of measurement was done. Results show that the system can effectively suppress the electromagnetic interference, and detect the target at the distance of 5 m. Therefore, it verifies the feasibility of the miniaturization technology.