The utility model relates to a chute is pinched and is met auxiliary device, concretely relates to pinch and meet scratch board conveyor chute push -and -pull composite set. The device around including two unable adjustment base and with front and back unable adjustment base articulated jack, the front and back unable adjustment base fix respectively on the working face of two adjacent chutes. Front and back unable adjustment base's structure is the same, be equipped with the otic placode on the unable adjustment base of front and back, be used for placing the block end of jack, be equipped with the round pin shaft hole on the otic placode, around the fixed plate with the jack is articulated. The utility model discloses utilize the strength of jack, set up the unable adjustment base of cross -over connection on the working face of two adjacent chutes, come quick the pinching of realization to connect with the help of the strength of jack, improved the efficiency of work, solved the chute and pinched the problem that connects inefficiency and operational safety difference.