FVB-K L anti-condensation blowback flat bag filter is a kind of bag filter used to separate the dispersed particles from the gas. It contains a shell which is fixedly connected with the upper and lower flower plates to form the air inlet chamber, the dust removal chamber and the ash removal chamber. The shell wall of the three chambers is respectively equipped with the air inlet pipe, the air outlet pipe and the ash removal door. The dust removal chamber is equipped with a set of filter bags fixedly connected on the two flower plates. Its feature is that the dust removal chamber is equipped with a vibrating mesh frame suspended and connected by the steel wire on the flower plate, and all filter bags are threaded into its mesh. The bag dust collector of the utility model has the characteristics of resisting condensation and preventing the filter bag from overheating, so it works reliably, has high dust removal efficiency, long service life and low manufacturing cost.