175MPa fracturing manifold system and fluid control method thereof

The invention discloses a 175MPa fracturing manifold system which comprises a high-pressure manifold, a low-pressure manifold, a plurality of side channel plug valves and a plurality of side channel plug valves, the high-pressure manifold and the low-pressure manifold comprise a main channel high-pressure manifold and a low-pressure manifold, and the two sides of the main channel high-pressure manifold are each provided with a plurality of side channel plug valves at intervals; a high-pressure unloading valve is arranged at one end, close to a wellhead, of the main channel high-pressure manifold; the pump discharge manifolds and the side channel plug valves are arranged in a one-to-one correspondence manner; the choke manifold is connected with one end of the main channel high-pressure manifold, and the other end of the main channel high-pressure manifold is connected with a shunt manifold; the other end of the shunt manifold is divided into two branch manifolds which are symmetrically arranged, the two branc