Compression molding method of small-sized airfoil composite sandwich part

The invention provides a compression molding method of a small-sized airfoil composite sandwich part. The compression molding method comprises the following steps of firstly, designing and manufacturing a foaming core split female mold formed by an upper mold of the foaming core split female mold and a lower mold of the foaming core split female mold, an overall paving and pasting male mold for curved skin and a total solidified split female mold, then demolding prepreg skin on the overall paving and pasting male mold, then combining and assembling the prepreg skin and a foaming sandwich partto form a composite sandwich part, and carrying out room temperature vacuum-pumping pre-compaction in the paving and pasting process; and sequentially putting the composite sandwich parts in the totalsolidified split female mold, carrying out heating solidification by using an upper hot press according to technological parameters of materials so as to ensure the consistency of the product quality, after the composite sand