The invention provides a hybrid duplex relay implementation method based on statistical probability selection. The method is characterized by comprising the following steps of step 1, pre-judging according to system characteristics, and acquiring system parameters; and step 2, selecting a corresponding working mode according to the system parameters, wherein the system is a one-way decoding and forwarding full-duplex relay system. The hybrid duplex relay implementation method based on the statistical probability selection, which is provided by the invention, focuses on maximization of the throughput of the system, and an optimal relay mechanism based on the statistical probability for a one-way full-duplex / half-duplex hybrid relay system is provided. The hybrid duplex relay implementationmethod based on the statistical probability selection adopts a hybrid duplex mechanism, so that the influence caused by residual self-interference in the full-duplex relay system is eliminated, and the transmission rate of the system is maximized. The relay selects the working mode of the system in each working time slot according to a certain probability.