After observing the crack characteristics and analyzing the physical properties of the materials involved, improvements were implemented to address the issue of dielectric blank cracking during the assembly process of a ceramic dielectric filter. These enhancements comprised installing a metal shielding cover and modifying the design of the printed board pad and reflow soldering process. Reliability tests of the welded device, including temperature and mechanical tests, were conducted, resulting in a product qualification rate of 100%. The analysis of DPA section revealed no risk of failure due to cracking or microcracking in the dielectric filter. The research findings indicate that this welding process effectively resolves the issue of welding cracks with ceramic dielectric filters, thereby achieving high product reliability.