A communication data sending method, comprising: user equipment UE indicating a Device to Device D2D data channel resource through D2D data channel resource indication information in D2D control indication information and/or index information corresponding to the D2D control indication information; and the UE sending D2D communication data on the D2D data channel resource, wherein the UE indicating the D2D data channel resource through the D2D data channel resource indication information and/or the index information comprises at least one of the following: the UE indicating a time domain resource and a frequency domain resource of the D2D data channel through the D2D data channel resource indication information; the UE indicating a time domain resource of the D2D data channel through the D2D data channel resource indication information and indicating a frequency domain resource of the D2D data channel through the index information; the UE indicating a frequency domain resource of the D2D data channel through the D2D data channel resource indication information and indicating a time domain resource of the D2D data channel through the index information; and the UE indicating a time domain resource and a frequency domain resource of the D2D data channel through the index information, characterized in that the D2D data channel resource indication information is contained in the D2D control indication information and indicates the time domain resource and/or the frequency domain resource of the D2D data channel through indication information of N bits, and under a situation that the D2D data channel resource indication information indicates the time domain resource and the frequency domain resource of the D2D data channel through the indication information of N bits, the method further comprises: indicating the time domain resource of the D2D data channel through indication information of N1 bits, and indicating the frequency domain resource of the D2D data channel through indication information of N2 bits, wherein N1+N2=N. the UE indicating a time domain resource and a frequency domain resource of the D2D data channel through the D2D data channel resource indication information; the UE indicating a time domain resource of the D2D data channel through the D2D data channel resource indication information and indicating a frequency domain resource of the D2D data channel through the index information; the UE indicating a frequency domain resource of the D2D data channel through the D2D data channel resource indication information and indicating a time domain resource of the D2D data channel through the index information; and the UE indicating a time domain resource and a frequency domain resource of the D2D data channel through the index information, characterized in that the D2D data channel resource indication information is contained in the D2D control indication information and indicates the time domain resource and/or the frequency domain resource of the D2D data channel through indication information of N bits, and under a situation that the D2D data channel resource indication information indicates the time domain resource and the frequency domain resource of the D2D data channel through the indication information of N bits, the method further comprises: indicating the time domain resource of the D2D data channel through indication information of N1 bits, and indicating the frequency domain resource of the D2D data channel through indication information of N2 bits, wherein N1+N2=N.