Asphalt concrete surface layer compaction detector

The utility model provides an asphalt concrete surface layer compaction detector. The asphalt concrete surface layer compaction detector comprises a detector body installed in a carrying box, a crank is rotated to enable a shaft rod to drive a flexible rolling plate to slide and roll in a sliding groove of a top plate, and then a user can manually lift sliding blocks on the two sides of a fixed bottom plate to slide in a placement groove; a limiting hook plate is movably connected to the top end of the placement groove through an insertion rod, a sliding block is limited and supported by rotating the limiting hook plate, a detection probe in the detector body can be pulled out from a wire collecting clamp, a detector line is conveniently stored by arranging the wire collecting clamp, and the practicability is high. A buffer assembly is arranged between a fixed bottom plate and a placement plate, and a detector body located on a mounting plate is buffered through hydraulic oil in a piston column and a spring o