Abstract: In a detailed study on the filter papers used as the substrate for testing the ignition propensity of cigarette,the mass,thickness and air permeability of Whatman 2# filter paper of different batches were determined,and the percentage of full length burn(PFLB) of cigarette was determined when a gap was present between cigarette and filter paper.The temperature field at the bottom of a stainless steel substrate was analyzed,and the PFLBs of standard cigarettes SRM1082 on different substrates were compared.The results showed that:1) There was difference between different batches of filter paper,the distance between cigarette and filter paper affected the test result of PFLB;2) The test results of standard cigarette sample reached the standard value of SRM1082(12.6%±3.3%) when one layer of filter paper on a 302 stainless steel plate of 0.2 mm in thickness was used as a substrate,it provided a clue to the study of alternative substrate for testing ignition propensity of cigarette.