This utility model discloses a waterproof low-pressure cabinet, comprising: multiple low-pressure cabinet bodies, with adjacent cabinet bodies interconnected based on a
busbar parallel connection structure; each cabinet body contains a channel steel base and a channel
steel frame, the channel
steel frame being fixed to the channel steel base; the channel
steel frame includes several sets of longitudinal plate frames, each set of longitudinal plate frames including multiple first and second plates; the first and second plates within each set of longitudinal plate frames are perpendicular to each other; each cabinet body has a waterproof door, the waterproof door being hinged to the cabinet body. This utility model, by setting a channel steel frame that fits against the inner wall of the cabinet body, distributes the force on the cabinet body to the channel steel frame, improving the overall load-
bearing capacity, reducing the risk of deformation due to
water pressure, and ensuring the low-pressure cabinet body maintains an IP68 waterproof and dustproof rating.