A method for non-contention random access, comprising: obtaining, by a second node, configuration information of non-contention random access; and sending, by the second node, according to the configuration information of the non-contention random access, a random access message on a Physical Random Access Channel, PRACH; characterized in that, wherein sending the random access message on the PRACH according to the configuration information of the non-contention random access comprises: continuously sending, by the second node, the random access message by taking P times as a unit and terminating sending of the random access message when a first termination condition is met, wherein P is a natural number; or sending, by the second node, the random access message for P times first, and continuing sending the random access message until a first termination condition is met; wherein the first termination condition comprises at least one of followings: the random access message is sent by taking P times as a unit, and is sent continuously for C times of the unit, wherein the C is system-configured, and P and C are natural numbers; the random access message is sent continuously for D times, wherein the D is system-configured and a natural number; or the second node successfully detects a random access response sent by a first node, and the RAR comprises a PRACH preamble index sent by the second node. obtaining, by a second node, configuration information of non-contention random access; and sending, by the second node, according to the configuration information of the non-contention random access, a random access message on a Physical Random Access Channel, PRACH; characterized in that, wherein sending the random access message on the PRACH according to the configuration information of the non-contention random access comprises: continuously sending, by the second node, the random access message by taking P times as a unit and terminating sending of the random access message when a first termination condition is met, wherein P is a natural number; or sending, by the second node, the random access message for P times first, and continuing sending the random access message until a first termination condition is met; wherein the first termination condition comprises at least one of followings: the random access message is sent by taking P times as a unit, and is sent continuously for C times of the unit, wherein the C is system-configured, and P and C are natural numbers; the random access message is sent continuously for D times, wherein the D is system-configured and a natural number; or the second node successfully detects a random access response sent by a first node, and the RAR comprises a PRACH preamble index sent by the second node. continuously sending, by the second node, the random access message by taking P times as a unit and terminating sending of the random access message when a first termination condition is met, wherein P is a natural number; or sending, by the second node, the random access message for P times first, and continuing sending the random access message until a first termination condition is met; wherein the first termination condition comprises at least one of followings: the random access message is sent by taking P times as a unit, and is sent continuously for C times of the unit, wherein the C is system-configured, and P and C are natural numbers; the random access message is sent continuously for D times, wherein the D is system-configured and a natural number; or the second node successfully detects a random access response sent by a first node, and the RAR comprises a PRACH preamble index sent by the second node. the random access message is sent by taking P times as a unit, and is sent continuously for C times of the unit, wherein the C is system-configured, and P and C are natural numbers; the random access message is sent continuously for D times, wherein the D is system-configured and a natural number; or the second node successfully detects a random access response sent by a first node, and the RAR comprises a PRACH preamble index sent by the second node.