In a process for manufacturing a singles ring yarn, a method and apparatus is invented which utilizes double belts as a false twist device and incorporates it in the conventional ring spinning machine for producing a singles ring yarn. In this invention, a double-belts is applied thus two twisting points, instead of one twisting point, are adopted for the yarn false twisting to improve the false twist efficiency. Accordingly, a ratio of the velocity of the belt to the delivery speed of the yarn is controlled and the wrapping angle of the yarn on the belts is adjusted in order to obtain the desired property of the final singles ring yarn. The said invention can enhance the strength of fiber strand at the spinning triangle and thus ensure the yarns spun in a normal condition at low twist multipliers, which is unable to be obtained by the conventional ring spinning machine. The method produces yarns with good strength, less hairiness and lower yarn residual torque at low twist level and endows the resultant fabric with softer handle, low spirality as well as clear and smooth surface appearance. The method and apparatus has the advantages of easy yarn piecing-up and doffing process, low spinning end-breakage when using ordinary raw materials and low cost of investment and maintenance, which not only is able to meet the commercial requirements of the large-scale production in the textile industry but also possesses a high false twist efficiency.