Preloading control module of force loading equipment

The utility model relates to a preloading control module of force loading equipment. Comprising a set of preloading PLC control module, the preloading PLC control module comprises a software and programming module, a direct current power supply module, an analog quantity module, a digital quantity module, a wireless communication module and a firmware interface, and the preloading PLC control module presets program codes, transfer functions and control instructions through the software and programming module. And an analog quantity module and a digital quantity module are used for correspondingly driving and controlling the actions of a control system with a master control PLC (Programmable Logic Controller), a servo hydraulic cylinder and a loading frame. The preloading control device of the force loading equipment is remotely controlled through convenient, visual and real-time preloading action, system inherent loads such as friction force of the equipment are accurately overcome, and a test workpiece is fe