The invention relates to a composite cross-arm manual icing device and a composite cross-arm manual icing arrangement method. Composite cross-arms are horizontally arranged; one end of each composite cross-arm is connected with an analog conductor, and the other end of the corresponding composite crossbar is grounded; rain showing bars are horizontally arranged above the composite cross-bars; water pipes are arranged on the rain showing bars; sprayers are arranged below the water pipes; the composite cross-arms or the rain showing bars are connected with an adjustment device; and the adjustment device is used for adjusting relative distances between the composite cross-arms and the rain showing bars. With the composite cross-arm manual icing device and the composite cross-arm manual icing arrangement method of the invention adopted, the surfaces of the composite cross-arms can be iced evenly, and the plurality of composite cross-arms can be iced simultaneously under a condition that a plurality of paths of rain showing bars are installed, and therefore, test efficiency can be improved.