Abstract: In this paper, a novel multi-pass pump scheme based on 4-f imaging is proposed. The scheme consists of a large parabolic mirror and two groups of folding prisms, which are the basic propagation structure of the scheme. The pump scheme has a theoretical aperture of 0−90° for laser transmission, which is wider than that of the commonly used pump schemes. The pump spot on the disk in the pump scheme has a good coincidence with sharp edges. With 344 W power injection and 18 times pumping, an average output of 141 W multi-mode laser is achieved. The optical to optical efficiency reaches 41%, and the slope efficiency is close to 50%.