The invention relates to a multiway valve and a hydraulic flow sharing system. The multiway valve comprises an initial valve body, a tail valve body, and a plurality of working valve bodies arranged between the initial valve body and the tail valve body. Main valves in the working valve bodies are all arranged in a center-closed mode. A compensation valve is further arranged in each working valve body. The initial valve body is provided with a load pressure increasing valve and a middle unloading valve. An oil inlet and an oil outlet of the load pressure increasing valve communicate with a main oil circuit and a load-sensitive oil circuit of the multiway valve correspondingly. A spring control end and a spring-free control end of the load pressure increasing valve communicate with a load control oil circuit and a load-sensitive oil circuit of the multiway valve correspondingly. An oil inlet and an oil outlet of the middle unloading valve communicate with the main oil circuit and an oil return circuit of the multiway valve correspondingly. A spring control end and a spring-free control end of the middle unloading valve communicate with the main oil circuit and the load-sensitive oil circuit of the multiway valve correspondingly. By the adoption of the multiway valve and the hydraulic flow sharing system, an anti-saturation function can be achieved, and the problem that the displacement response of a pressure compensation valve overshoots is solved.