Quick-change device capable of automatically conducting hydraulic and electrical channels

The invention discloses a quick-change device capable of automatically conducting hydraulic and electrical channels. The quick-change device comprises an upper connecting frame and a lower connectingframe. The upper connecting frame comprises a machine frame, a signal rod, a supporting rod, hydraulic push rods, a valve body, hydraulic quick-plug female ends, electrical quick-plug female ends, spring bolts, a fender and a bracket. The lower connecting frame comprises a lower machine frame, hydraulic quick-plug male ends and electrical quick-plug male ends, the hydraulic push rods are installedin the valve body, and the telescopic ends of the hydraulic push rods are fixed to the machine frame; and the hydraulic quick-plug female ends, the electrical quick-plug female ends and the spring bolts are fixed to the valve body. By operating the quick-change device, the purpose of easily and quickly replacing different working accessories can be achieved; and meanwhile, automatic conducting ofa hydraulic oil way and a