The invention provides a support board elevating mechanism in a dyeing and finishing machine for umbrella fabrics and belongs to the technical field of machinery technology. The invention solves the problem of inconvenience usage of dyeing and finishing machines in the prior art. According to the support board elevating mechanism in a dyeing and finishing machine for umbrella fabrics, the dyeing and finishing machine for umbrella fabrics comprises a rack and a dyeing chamber which is installed on the rack; the support board is installed inside the dyeing chamber in the horizontal direction and one side of the support board is used for installing a sprinkler head; the elevating mechanism comprises a lead screw which is vertically installed at the other side of the support board and the lead screw is rotationally installed inside the dyeing chamber; a motor which can drive the lead screw to rotate about the axis of its self is installed on the rack; a nut is connected to the lead screw in a bolt joint mode and the lead screw is also sleeved with a straight-tube-like connecting cylinder at the outside; one end of the connecting cylinder is axially fixed with the nut through a first bearing and the other end of the connecting cylinder is fixed with the support board. The support board elevating mechanism in a dyeing and finishing machine for umbrella fabrics is convenient to use.