The invention discloses a bag type dust collector for flue gas treatment of a stamp-charging coke oven. The bag type dust collector comprises a box body, wherein a purified gas chamber and a filtering chamber which are isolated from each other are formed inside the box body, a gas inlet pipe and a gas outlet pipe are separately arranged on two sidewalls of the box body, the purified gas chamber communicates with the gas outlet pipe, the filtering chamber communicates with the gas inlet pipe, a gas ejector pipe is arranged in the purified gas chamber, one end of the gas ejector pipe penetrates through the purified gas chamber, extends out of the box body and is provided with a pulse valve, a plurality of filtering bags are arranged in the filtering chamber, one end of each filtering bag communicates with the purified gas chamber, and a plurality of nozzles which are in one-to-one correspondence to the filtering bags are formed in the gas ejector pipe; a flow guiding plate which is inclined along a gas inlet direction is mounted at the other end of a pre-dedusting plate, and a counterweight block is fixed on a side face, back to the gas inlet pipe, of the pre-dedusting plate. Through carrying out secondary collection on dust in flue gas, gas which is finally exhausted from the gas outlet pipe is in line with industrial standards, and the aim that the improvement on dedusting effect is urgently needed in the industry is achieved.