A quick-release connecting assembly, including a spring core and a socket, said spring core including a sleeve-connected elastic portion and a clamping boss set on said sleeve-connected elastic portion; one end of said socket is opened to form a hole adapted to receive the spring core plugged into and a hole wall surrounding said hole. A clamping slot is adapted to receive said clamping boss formed in said hole wall, said slot determining an abutment edge for abutting the clamping boss. A push member is located in correspondence to said clamping boss and is set on the socket at the clamping slot, said sleeve-connected elastic portion being arranged to elastically engage the clamping boss with the abutment edge when the sleeve-connected elastic portion of the spring core is plugged into the hole of the socket.