A message processing method, comprising: generating, by a first in-vehicle terminal, a safety message, wherein the safety message comprises message content and a message type; determining, by the first in-vehicle terminal according to the message content and the message type, a priority value corresponding to the safety message; and sending, by the first in-vehicle terminal according to the priority value corresponding to the safety message, the safety message by using a vehicle direct communication physical, VDC PHY, layer or separately by using a cellular physical cellular PHY layer and the VDC PHY layer, so that a base station and/or a second in-vehicle terminal receive/receives the safety message; wherein the base station and the first in-vehicle terminal each pre-establish a vehicle direct communication-radio bearer,VDC-RB; characterized in that after the generating, by a first in-vehicle terminal, a safety message, and before the sending, by the first in-vehicle terminal according to the priority value corresponding to the safety message, the safety message by using a vehicle direct communication physical VDC PHY layer or separately by using a cellular physical cellular PHY layer and the VDC PHY layer, the method further comprises: adding, by the first in-vehicle terminal, obtained location information and speed information to the safety message by using an Intelligent Transportation System Protocol ITSP layer; and transparently transmitting, by the first in-vehicle terminal, the safety message from the ITSP layer to a Media Access Control MAC layer by using a Packet Data Convergence Protocol, PDCP, layer and a Radio Link Control, RLC, layer; and sending, by the first in-vehicle terminal according to the priority value corresponding to the safety message, the safety message by using a vehicle direct communication physical VDC PHY layer or separately by using a cellular physical cellular PHY layer and the VDC PHY layer comprises: triggering, by the first in-vehicle terminal, the MAC layer to send, according to the location information, the speed information, and the priority value corresponding to the safety message, the safety message by using the VDC PHY layer or separately by using the cellular PHY layer and the VDC PHY layer. generating, by a first in-vehicle terminal, a safety message, wherein the safety message comprises message content and a message type; determining, by the first in-vehicle terminal according to the message content and the message type, a priority value corresponding to the safety message; and sending, by the first in-vehicle terminal according to the priority value corresponding to the safety message, the safety message by using a vehicle direct communication physical, VDC PHY, layer or separately by using a cellular physical cellular PHY layer and the VDC PHY layer, so that a base station and/or a second in-vehicle terminal receive/receives the safety message; wherein the base station and the first in-vehicle terminal each pre-establish a vehicle direct communication-radio bearer,VDC-RB; characterized in that after the generating, by a first in-vehicle terminal, a safety message, and before the sending, by the first in-vehicle terminal according to the priority value corresponding to the safety message, the safety message by using a vehicle direct communication physical VDC PHY layer or separately by using a cellular physical cellular PHY layer and the VDC PHY layer, the method further comprises: adding, by the first in-vehicle terminal, obtained location information and speed information to the safety message by using an Intelligent Transportation System Protocol ITSP layer; and transparently transmitting, by the first in-vehicle terminal, the safety message from the ITSP layer to a Media Access Control MAC layer by using a Packet Data Convergence Protocol, PDCP, layer and a Radio Link Control, RLC, layer; and sending, by the first in-vehicle terminal according to the priority value corresponding to the safety message, the safety message by using a vehicle direct communication physical VDC PHY layer or separately by using a cellular physical cellular PHY layer and the VDC PHY layer comprises: triggering, by the first in-vehicle terminal, the MAC layer to send, according to the location information, the speed information, and the priority value corresponding to the safety message, the safety message by using the VDC PHY layer or separately by using the cellular PHY layer and the VDC PHY layer. adding, by the first in-vehicle terminal, obtained location information and speed information to the safety message by using an Intelligent Transportation System Protocol ITSP layer; and transparently transmitting, by the first in-vehicle terminal, the safety message from the ITSP layer to a Media Access Control MAC layer by using a Packet Data Convergence Protocol, PDCP, layer and a Radio Link Control, RLC, layer; and sending, by the first in-vehicle terminal according to the priority value corresponding to the safety message, the safety message by using a vehicle direct communication physical VDC PHY layer or separately by using a cellular physical cellular PHY layer and the VDC PHY layer comprises: triggering, by the first in-vehicle terminal, the MAC layer to send, according to the location information, the speed information, and the priority value corresponding to the safety message, the safety message by using the VDC PHY layer or separately by using the cellular PHY layer and the VDC PHY layer.