Connecting device of LED box body and LED display device

The invention provides a connecting device of an LED box body and an LED display device. The connecting device of the LED box body comprises a first connecting assembly, a second connecting assembly, a second inserting part, a driving part and an elastic reset piece, wherein the first connecting assembly comprises a first inserting part, the second connecting assembly comprises a fixed seat; the second inserting part is movably arranged on the fixing seat and is provided with an extending position matched with the first inserting part in an inserting manner and a retracting position separated from the first inserting part; the driving part is movably arranged on the fixed seat, and the driving part is connected with the second inserting part through a linkage device so as to drive the second inserting part to move between a retraction position and an extension position; and the elastic reset piece is arranged between the fixed seat and the driving part. According to the connecting device, a problem that in th