Support structures are widely utilized in nuclear engineering projects. The quality of their design is crucial to the stability of supported equipment. Finite Element Analysis (FEA) method is widely used in evaluating mechanical performance of support structure. However, an effective automated evaluation software remains absent. In this study, an automatic verification method for support structure in nuclear sector is proposed. Using the RCC-M code as a reference, this novel method facilitates direct codified post-processing of finite element analysis (FEA) results obtained by Code_Aster. This method achieves automated evaluation by summarizing and integrating the RCC-M and other nuclear power standards for linear supports. For different operation conditions, appropriate verification method and the associated safety criteria are firstly determined according to nuclear codes. The software automatically identifies the locations of linear supports needing assessment, and performs the required validations to generate the verification report. Furthermore, an automated evaluation process based on the RCC-M was implemented in a cloud-based industrial software to accelerate the entire simulation and design workflow of nuclear-grade supports. This process was validated through 300 case studies from the nuclear sector, achieving an error margin of less than 5% over 95% of cases, thereby ensuring stability and reliability. Using a complex support structure as a case study, this paper demonstrates how the proposed methodology, in compliance with RCC-M standards, enables engineers to conduct verifications rapidly and reliably, and produce corresponding reports. The approach fulfills the goals of simulation-design integration, standardization verification processes, and automatic report generation, offering an efficient solution for the digitalization of engineering standards in the nuclear industry.