The invention discloses a pilot frequency multiplexing method based on a continuous pilot frequency multiplexing factor, which comprises the following steps of: 1, acquiring initially optimized pilotfrequency multiplexing factors of all users in the same cell, judging whether the initially optimized pilot frequency multiplexing factors are in a specified area or not, if so, carrying out a step 2,otherwise, taking 1 as an optimal pilot frequency multiplexing factor of all the users in the cell; 2, selecting a minimum interval containing an average pilot frequency multiplexing factor in the pilot frequency multiplexing factor integer set, judging whether the multiplexing probability of the pilot frequency multiplexing factor in the interval is within an interval [0, 1], if so, taking (theta0 [lambda 1] _, (1-theta0) [lambda 1] +) as an optimal pilot frequency multiplexing factor, and if not, going to the step 3; and 3, comparing the spectral efficiencies of the unit users when the pilot frequency multiplexing factors are [lambda] 1 _ and [lambda] 1 +, and selecting the pilot frequency multiplexing factor corresponding to the maximum spectral efficiency value as the optimal pilot frequency multiplexing factor. According to the optimization adjustment method, the pilot frequency multiplexing factor of the cell can reach any value including an integer and a decimal on the whole, and the hopping of the spectral efficiency is effectively improved.