The invention relates to a production method for continuously formylatelating monoolefine and hydrogen and producing corresponding aldehydess by adopting a static mixing reactor. The method comprises the following steps of: sending an aqueous solution of a water-soluble rhodium-phosphine complex catalyst and partial propionaldehyde in a circulating tank into a static mixing reactor at a certain velocity of flow by a circulating pump; enabling the mixed gases of monoolefine, hydrogen and carbon monoxide to enter the static mixing reactor in the same direction; entering the circulating tank after finishing the reaction; separating and enabling unreacted gases in the tank to enter a tail gas condensate cooler; condensing the aldehydess brought by the gases back to a product tank; enabling liquid entering the circulating tank to stand still and laminate, wherein the aldehydess at the upper layer overflows and enters the product tank; and the catalyst-contained water phase at the lower layer circularly returns to the static mixing reactor by the circulating pump. The invention has the advantages of simple process flows, easy operation control, strong equipment mass transfer strength, high production capability, simple equipment and lower manufacture cost. The method decreases the catalyst amount and reduces the investment cost, thereby being a most suitable process method for formylatelating monoolefine and hydrogen.