Puncture-proof retractable blood taking needle

The utility model relates to the technical field of blood taking needles, and particularly discloses a puncture-proof retractable blood taking needle which comprises a protection box and an extrusionblock, a limiting cylinder is fixedly connected to the center of the top of the inner wall of the protection box, a puncture needle is fixedly connected to the center of the bottom of the limiting cylinder, and a silica gel pad is fixedly connected to the bottom of the extrusion block. A limiting through hole is formed in the center of the top of the extrusion block, the bottom of the limiting through hole penetrates through the bottom of the silica gel pad, the limiting cylinder is slidably connected into the limiting through hole, reset springs are evenly and fixedly connected to the top ofthe inner wall of the protection box, the bottoms of the reset springs are fixedly connected with the top of the extrusion block, and a box cover is movably inserted into the bottom of the protectionbox. The center of the top