The utility model discloses a multi-hydraulic cylinder pressure regulating and maintaining control loop. Two electric proportional pressure reducing valves and an electromagnetic directional valve are communicated with an oil supply opening P and an oil return opening T in parallel; the outlet ends of the two electric proportional pressure reducing valves are respectively communicated with a shuttle valve; the outlet end of the shuttle valve is communicated with a pressure sensor of a pressure adjusting oil way; the outlet ends of the electromagnetic directional valve and the shuttle valve are communicated with a plurality of hydraulic loop units; each unit comprises two hydraulic cylinders, two first energy accumulators, a second energy accumulator, two hydraulic control one-way valves, an electromagnetic ball valve, two pressure gauges and one pressure sensor. The multi-hydraulic cylinder pressure regulating and maintaining control loop is novel in conception, safe and reliable, and suitable for multi-hydraulic cylinder pressure regulating and maintaining loop control in injection head control and similar fields of oil continuous tube equipment.