The invention relates to an automatic control device of an oil pipe clamping mechanism of a non-well killing workover rig, belonging to the field of non-well killing workover operation equipment. The automatic control device is used for the non-well killing workover operation equipment and comprises a control device, a plurality of electromagnetic valves, oil pressure sensors and hydraulic oil cylinders, wherein the control device takes a controller loading self-authoring software as a core; the oil pressure sensors are the same as the electromagnetic valves in number; and the hydraulic oil cylinders are the same as the electromagnetic valves in number. The automatic control device is characterized in that a data processing device comprises a DI (Data Input) module, a CPU operation processor, a DO (Data Output) module, a power amplifier, an A / D (Analog / Digital) input modules and a CPU, wherein the DI module, the CPU operation processor, the DO module and the power amplifier are sequentially connected, and the A / D input module is connected with the CPU; an executive device comprises eight electromagnetic valves, six hydraulic oil cylinders, two hydraulic valves and a clamping mechanism; and the input end of the A / D input module is also connected with eight oil pressure sensors, and the oil pressure sensors are connected with oil inlet pipelines of the hydraulic oil cylinders orthe hydraulic valves one by one. The invention solves the problem of equipment safety caused by the complexity and the easy error of the manual operation of the oil pipe clamping mechanism and reduces the labor intensity of operators.