The invention provides a fluid average distributor with a single axial inlet and multiple lateral outlets. The fluid average distributor is provided with a body, one end of the body is provided with afluid inlet, the other end of the body is closed, a row of equal-spaced and equal-diameter fluid outlets are formed in one side of the body, thus a flow path allowing fluid to flow through is formedin the body, the cross-sectional area of the body perpendicular to the flow path is gradually decreased from one end of the fluid inlet to the other end of the fluid inlet, and the flow rates at all the fluid outlets are equal.