The invention discloses a welding combination solid comb-like bearing cage and a manufacturing method thereof. The bearing cage comprises an annular retaining ring and a plurality of vertical column bodies connected to both end surfaces of the retaining ring, wherein the vertical column bodies positioned on both end surfaces of the retaining ring are arranged in a staggered manner and extend alongthe axial direction of the retaining ring, the retaining ring is provided with a plurality of positioning holes, the end portions of the vertical column bodies are provided with rabbets, and the rabbets are fixed in the positioning holes. According to the manufacturing method, the retaining ring and the vertical column body are respectively manufactured by using a separated molding method. According to the present invention, the bearing cage does not have brittle change, wherein the vertical column body and the retaining ring are firmly connected, the root portion of the vertical column bodyis not easily broken, and the manufacturing method has high yield and high production efficiency.