The work aims to investigate the method of improving the determination results accuracy of paper wet tensile strength. A kind of wet strength paper was selected as a sample. Wet tensile strength and moisture content of the immersed sample were determined through altering wiping force and its action time after paper was immersed in water, respectively. In addition, the determination results in the best wiping force and action time were compared with the test results obtained by the standard method. The standard deviation of wet tensile strength was reduced from 0.4 to 0.1, and the coefficient of variation was reduced from 7.18% to 1.86% when the wiped farmar quality was 500 g and the action time was 15 s. The determination results show that the accuracy of paper wet tensile strength was greatly improved. In order to reduce the influence of human factors on the accuracy of the paper wet strength test results, wiping force and its action time can be specified in the standard.