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Homemade water in water cationic polyacrylamide(CPAM)emulsion was applied in cigarette paper pulp as dry strengthening agent with other strengthening agent.Good collaborative effect was achieved when CPAM was used in bleached wheat straw pulp with strengthening agent E and with cationic additives L as paper pulp strengthening agent.It was also showed that distinct strengthening effect was obtained when CPAM emulsion was applied in mixture of bleached needle kraft pulp(NBKP)and wheat straw pulp,breaking length and tearing index of cigarette handsheet made of mix pulp was respectively increased by 22.2%and17.0%when the dosage of CPAM was 0.8%of dry fiber.Through analysis of cigarette handsheet section scanning electron microscopy(SEM)photos,strengthening mechanism of CPAM emulsion to cigarette paper pulp was preliminary studied.