The invention provides a front display module self-locking device used for locking a front display module to a case. The front display module self-locking device comprises a clamping assembly arrangedinside the case of the display device, the clamping assembly comprises a clamping shaft connected to the front display module and a clamping plate connected to the case, the clamping plate and the clamping shaft are clamped or disassembled, the front display module self-locking device further comprises a pulling assembly connected to the clamping plate, the pulling assembly comprises a pressing mechanism, one end of the pressing mechanism stretches out of the case, the pressing mechanism is used for driving the clamping plate and the clamping shaft to be separated, and the front display module self-locking device further comprises a reset assembly for being connected with the clamping plate and the case and clamping the clamping plate and the clamping shaft. Accordingly, due to the simplepressing-fit actions, the clamping plate and the clamping shaft are locked, the clamping plate and the clamping shaft can be pushed to be separated by pushing the pressing mechanism with one end stretching out of the case, troubles and potential safety hazards possibly caused by a traditional mechanical lock external mode are omitted, and the appearance and user experience of the while front maintenance type display device are greatly optimized.