The invention relates to a novel composite reinforced rubber sleeve flexible cable for a coal mining machine. A multi-core power line core conductor adopts a tinned copper wire multistrand structure; the conductor is externally provided with a first heat-resistant super-smooth thin film isolation strip, a high-strength power line insulator, a first double-sided semi-conducting cotton cloth strip,and a metal/ fiber-woven shielding reinforcing layer in sequence; a control line core and a monitoring line core bunch strand use high-strength aramid fiber wires as a central strand, and the tinned strand multistrand and a metal-woven layer improve strength and flexibility; a multistrand line core stranding and heat-resistant super-smooth thin film isolation strip winding improve circumnutation,bending and slippage properties of the coal mining machine cable; the high-strength DPEM insulator, a high-strength inner sheath and a flame-retarded and high-strength outer sheath ensure strength and impact resistance of the cable; a multi-core power line core, a multi-core monitoring line core cable, a multi-core control line core cable and a plurality of semi-conducting adhesive tapes are twisted into an integrated assembly cable; and the assembly cable outside is wound with a second double-sided semi-conducting cotton cloth strip and an extruding flame-retarded sheath layer.