A pneumatic self-balancing double-way return valve for circulating fluidized bed boiler pertains to a return device used on circulating fluidized bed boiler and relates in particular to a structural design of a single-point material feeding and multi-point material returning device. The return valve comprises a material feeding pipe, lower part of which connects with a moving filling bed; two horizontal outlets at back part of the moving filling bed connect with two material returning beds, each of which is provided connectedly with a material returning pipe; a wind distributing blast box is arranged under each material returning bed and also under the moving filling bed. The general valve casing is made of steel plates lined with wear-proof refractory materials. The return valve works on the principle that materials separated by a separator are returned through the return valve into the boiler hearth under the effect of pressure fluidizing air. The utility model is characterized by single-point material feeding and multi-point material returning, which makes the circulating materials more uniform when entering the boiler hearth and is able to effectively solve the problem of non-uniformity of circulating materials in large-scale circulating fluidized bed boilers.