Quick-changing device for accessories of hydraulic excavator working device

The invention discloses a quick-changing device for accessories of a hydraulic excavator working device. The quick-changing device comprises a pin roll, a base body, a slide block assembly and an oil cup, wherein the slide block assembly slides up and down to install, clamp, and dismount the accessories of the working device. The invention provides an effective solution for meeting the requirements of short consumed time, low cost and high efficiency when a user frequently changes the accessories of the hydraulic excavator working device.