The present invention discloses a drilling coring loading mechanism with a characteristic of transmission depending on friction force. The drilling coring loading mechanism is characterized by comprising a drive unit and a frictional transmission unit. The drive unit is provided with a drive motor, wherein the motor is fixed on a support seat, and a motor power output shaft is connected with an outer spline drive shaft. The frictional transmission unit is provided with a drive drum, wherein the axis center position inside the drive drum is a hollow inner spline structure, and is engaged with the outer spline drive shaft. The drive drum is fixedly connected with an axial movement block, wherein the axial movement block and the drive drum are concentric, and the axial movement block is provided with threads. A fixation block is arranged correspondingly to the axial movement block, and is fixedly connected on the support seat, wherein the fixation block is provided with threads engaging with the threads on the axial movement block. The drive drum is wound with a drive traction rope, wherein the traction direction of the traction rope can maintain the constant state so as to avoid yawing. Compared with the rigid loading, the drilling coring loading mechanism of the present invention has the following advantages that: the equipment can be protected well, the structure is compact, the size is small, the weight is light, and the drilling coring loading mechanism is more suitable for drilling in outer space.