The utility model relates to a novel vertical-axis wind power generation device. According to the technical scheme, the device comprises spiral blades, a rotary shaft, connecting rods, leaf springs, openable wind-catching blades, pushing rods and a power generator, wherein the spiral blades are installed on the periphery of the rotary shaft, the upper portion of the rotary shaft is fixed to the multiple connecting rods, the lower portion of the rotary shaft is in linkage with a connecting shaft of the power generator, and the outer end of each connecting rod is connected with the corresponding openable wind-catching blade; each openable wind-catching blade comprises an inner blade body, an outer blade body, a flexible connector and a leaf spring, each outer blade body is fixed to the outer end of the corresponding connecting rod, the inner blade bodies of every two symmetrical openable wind-catching blades are connected through the corresponding pushing rod, each inner blade body is provided with a through hole, and the upper portion of the rotary shaft is fixed to the four connecting rods. The device has the advantages that the S-shaped spiral blades are installed on the rotary shaft, wind power can be received sufficiently to drive the rotary shaft to rotate, in this way, the rotating speed of the wind power generation device is increased, wind power is fully utilized, and generated power is increased.