Abstract: In this article, the structure and types of the shear ram are introduced, the working principle and shearing mechanism of shear brake BOP are given. Based on the recommended types of the BOP stack with shear ram, the existing problems of the supporting equipment of the BOP stack with the shear ram are listed, and risks of the lack of the supporting equipment are analyzed; The operating essentials of preparing ultra-high pressure hydraulic oil with gas pump through making good use of the electronic pump are discussed. It provides technical support for implementing the well control and ensuring the practical application of operations.