In order to further optimize the performance of miniaturized lasers, based on general principles, an all fiber laser housing structure with output power greater than 10 W and high stability at 1030 nm was designed for miniaturization. The shell volume was 220 mm×270 mm×75 mm, and the mass was less than 7 kg. The shell structure adopted a flexible support vibration reduction design, and could maintain normal operation of the laser on a miniaturized platform with temperatures ranging from -55℃ to 45℃. Thermal analysis and random vibration analysis were conducted on the laser casing using finite-element analysis software. The miniaturized all fiber laser prototype was processed according to the design drawings and experimentally verified. The results indicate that, at a temperature of 45℃, the hottest surface temperature of the laser is 49.5℃, with a temperature rise of about 4.5℃, indicating good heat dissipation performance. Under the random vibration condition of power spectrum density total root mean square 10.77 g, maximum of 3σ stress of the laser is 171 MPa, and the root mean square value of the random vibration response is only 24.5 g, indicating good mechanical properties of the shell structure. The heat dissipation and mechanical properties of the laser shell structure fully meet the design requirements, and the experimental results are in good agreement with the simulation results. This study provides a certain reference for the specific implementation of miniaturized fiber laser projects.