The invention provides a cathode protection system for parallel ore pulp conveying pipelines for overcoming the defects existing in the prior art. The cathode protection system for the parallel ore pulp conveying pipelines comprises an anode bed (2), a first power supply (3) and two or more to-be-protected pipelines (1) which are parallel and convey in the same direction; the anode bed (2) communicates with the anode of the first power supply (3), after all the to-be-protected pipelines (1) are connected in parallel, all the to-be-protected pipelines (1) communicate with the cathode of the first power supply (3); and monitoring piles (4) for monitoring the states of the pipelines are installed on the to-be-protected pipelines (1); and all the to-be-protected pipelines (1) are in connected in parallel on the monitoring piles (4) through equalizing wires. According to the cathode protection system for the parallel ore pulp conveying pipelines; effective protection on impressed current cathodes of the two or more parallel pipelines can be achieved through one cathode protection system, and installing and maintaining cost of equipment is saved; and the head and tail ends of the pipelines and the connection ends of all the monitoring piles are in connected in parallel through the equalizing wires, voltage on all the pipelines is balanced, and the quantity and strength of stray currents between the pipelines are lowered.