The invention relates to a carrier finishing method containing DDT mosquito repelling and killing fibers, which comprises the following steps of: (1) the emulsification of a carrier: 3 grams to 8 grams of fatty alcohol polyoxyethylene ether is dissolved by hot water, 20 grams to 70 grams of the carrier is added, 100ml to 150ml of the hot water is added, the mixture is stirred for 30 minutes, and then is cooled to 50 DEG C, ethanol is added, and then the mixture is stirred for 10 minutes to 15 minutes to obtain an emulsion which is then put into a closed container for standby; (2) the prescription of finishing fluid: the DDT and cyclohexanone are dissolved according to the mass ratio of 1 : 1.3 to 1 : 1.5, 40g/l to 80g/l of compounds of a nonionic surface active agent and a negative ion surface active agent and 2g/l to 5g/l of carrier emulsion are added to prepare the finishing fluid; (3) the finishing technology: when the temperature of the finishing fluid is risen to 60 DEG C, a fiber product is put into the finishing fluid according to the bath ratio of 1 : 10 to 1 : 15, after the processes of insulating, temperature rising, temperature retaining and temperature reducing, the fiber product is washed by water for two times, dehydrated and dried under the temperature of 80 DEG C to 100 DEG C. The mosquito repelling and killing fiber product has efficient mosquito repelling and killing effect and strong persistence and is harmless to human beings and animals in general conditions.