A control assembly of an internal clutch comprising: a first control unit for controlling the fixedness of a sun gear (28,29); a second control unit for controlling engagements of inner gears at two sides and a planet frame; a third control unit for controlling the sun gear or the inner gears and the planet frame; and wherein power for control units are from rotary dynamic components, by displacements of driving rods for controlling operations of a cam or cam-like component; by using the cam or cam-like unit to function clutch or by using the cam or cam-like unit to drive a driven device to rotate or displace for operation of the clutch, characterized by the first control unit is an axial clutching control unit and further comprising: a center shaft having at least one guide recess for receiving a clutching driving rod; an actuating sliding seat installed outside the center shaft; a surface of the sliding seat being installed with a left gear, a ratchet ring and a right gear; the ratchet gear ring being installed between the left gear and the right gear; between the left gear and the center shaft being installed with a left spring base, a left sliding block returning spring and a left actuating sliding block which is resisted by the sliding block returning spring and is controlled by the cam base; and between the right gear and the center shaft being installed with a right spring base, a right sliding block returning spring and a right actuating sliding block which is resisted by the sliding block returning spring and is controlled by the cam base. a first control unit for controlling the fixedness of a sun gear (28,29); a second control unit for controlling engagements of inner gears at two sides and a planet frame; a third control unit for controlling the sun gear or the inner gears and the planet frame; and wherein power for control units are from rotary dynamic components, by displacements of driving rods for controlling operations of a cam or cam-like component; by using the cam or cam-like unit to function clutch or by using the cam or cam-like unit to drive a driven device to rotate or displace for operation of the clutch, characterized by the first control unit is an axial clutching control unit and further comprising: a center shaft having at least one guide recess for receiving a clutching driving rod; an actuating sliding seat installed outside the center shaft; a surface of the sliding seat being installed with a left gear, a ratchet ring and a right gear; the ratchet gear ring being installed between the left gear and the right gear; between the left gear and the center shaft being installed with a left spring base, a left sliding block returning spring and a left actuating sliding block which is resisted by the sliding block returning spring and is controlled by the cam base; and between the right gear and the center shaft being installed with a right spring base, a right sliding block returning spring and a right actuating sliding block which is resisted by the sliding block returning spring and is controlled by the cam base. a center shaft having at least one guide recess for receiving a clutching driving rod; an actuating sliding seat installed outside the center shaft; a surface of the sliding seat being installed with a left gear, a ratchet ring and a right gear; the ratchet gear ring being installed between the left gear and the right gear; between the left gear and the center shaft being installed with a left spring base, a left sliding block returning spring and a left actuating sliding block which is resisted by the sliding block returning spring and is controlled by the cam base; and between the right gear and the center shaft being installed with a right spring base, a right sliding block returning spring and a right actuating sliding block which is resisted by the sliding block returning spring and is controlled by the cam base.