The invention discloses a synchronous jacking device of a cloth folding machine. The device comprises a stick-like ejector rod which is horizontally arranged. A lifting bracket and a fixed bracket are separately arranged at two ends of the ejector rod. Four lifting cross bars are arranged between the lifting bracket and the fixed bracket. The synchronous jacking device of the cloth folding machine disclosed by the invention has the advantages that during use, a user connects a driving flange to an external lifting air cylinder; when the lifting air cylinder starts, the lifting brackets at two ends of the ejector rod synchronously move upward or downward to fold cloth on a cloth feeding groove. As the lifting brackets move synchronously, the cloth is precisely folded and is neat and attractive in shape, and no wrinkles are available at the corners, so that the reliability and the feasibility of the cloth folding machine are effectively provided. The synchronous jacking device of the cloth folding machine is simple in structure, obvious in effect, low in cost and high in practicality.