The invention discloses a general modular teaching practice device for chemical production lines. The device comprises a public engineering module, a reaction module, a crystallization module, a sieveplate rectification module, an emulsification module, a slurry blending module, an evaporative condensation module, a pretreatment module, an extraction module and a drying module and also comprisesa water distribution module, an A2O module, an aftertreatment module and an electric control system. All the modules are freely matched, combined and connected according to teaching practice requirements, the electric control system comprises electric control cabinets arranged in all the modules, and the electric control cabinet in each module is provided with a controller and a touch screen. Thedevice can effectively help students master related knowledge of various chemical treatment processes and basic principles of the treatment processes, enhance the ability of students for controlling various chemical production treatment process indexes and improve capacity for chemical production line design, building, debugging and control operation.