The invention provides a glass bottle and a manufacturing method thereof and belongs to the technical field of glass bottle manufacturing. The glass bottle consists of inner glass and outer glass, sandwich glass is arranged between the inner glass and the outer glass, and the inner glass is a decorative pattern layer. The manufacturing method of the glass bottle includes the steps of (1), melting raw materials of the sandwich glass, putting a sandwich glass blank into a mould, and molding the sandwich glass into a glass bottle body through a blowing technology so as to obtain a sandwich glass bottle body; (2), putting an inner glass blank into the sandwich glass bottle body so as to obtain a glass bottle body combining the inner glass with the sandwich glass; (3), suspending the glass bottle body obtained in the step (2) in a mould, pouring molten outer glass into a clearance and cooling to mold; (4) sealing to obtain the required glass bottle. The glass bottle and the manufacturing method thereof have the advantages that the manufacturing method is simple in technology, low in cost and capable of forming natural patterns to give people illusionary aesthetic feeling.