The invention discloses a collaboration network power distribution method based on artificial noise under a nonideal channel estimation condition of a collaboration channel. The method comprises the steps that S1, a legal receiving end sends pilot sequences to a transmitting end of an transmitting source, and a collaboration jammer; S2, the transmitting end receives the pilot sequence and carries out ideal channel estimation, and the collaboration jammer receives the pilot sequence and carries out nonideal channel estimation; S3, the transmitting end and the collaboration jammer design respective transmitting signals; S4, the transmitting end and the collaboration jammer transmit signals to the legal receiving end and an eavesdropping end at the same time; S5, the optimum transmitting power distribution ratio and the maximum safe transmission rate under the nonideal channel estimation condition of the collaboration channel are calculated; S6, the optimum transmitting power distribution ratio and the maximum safe transmission rate under an ideal channel estimation condition of the collaboration channel are calculated; and S7, the maximum safe transmission rates under the nonideal channel estimation condition and the ideal channel estimation condition are compared. According to the collaboration scheme provided by the method, the condition that an error exists in the channel estimation method of the collaboration channel is taken into full consideration, and the practical power distribution scheme for realizing system safety is proposed.