Abstract: In response to the structural design requirements of a new type of prefabricated foundation for box-type substations in distribution network engineering, this paper uses ANSYS software to conduct a finite element analysis of the force state of the new prefabricated foundation, and on this basis, carries out its safety and reliability assessment. Based on the actual force conditions of the structure and combined with the Winkler foundation model, a three-dimensional finite element model of the new type of prefabricated foundation was established, and the static analysis of the structure was completed. Subsequently, a reliability analysis of the new type of prefabricated foundation was conducted based on the Monte Carlo simulation method of Latin hypercube sampling. The numerical results show that it can be seen from this that the performance of this new type of prefabricated foundation fully meets the requirements of practical applications. The design scheme is reasonable and feasible, and it is within the safety allowable range.