Fluid distribution system and fluid reaction system

The invention discloses a fluid distribution system which comprises a plane rotation switching valve, an annular liquid collecting pool, a first conveying pipe and a transmission device, and the plane rotation switching valve comprises a fixed valve disc and a rotary valve disc which is in sealing connection with the fixed valve disc and can rotate around the central axis; n pairs of fluid channels which are correspondingly arranged and penetrate through a valve disc body are uniformly distributed on the fixed valve disc and the rotary valve disc, and each pair of fluid channels comprises a feeding fluid channel and a discharging fluid channel; m groups of annular liquid collecting tanks are arranged, and each group of annular liquid collecting tanks comprises a feeding liquid collecting tank and a discharging liquid collecting tank; one end of the first conveying pipe is communicated with the fluid channel on the rotary valve disc, and the other end is arranged in the annular liquid collecting pool; the tran