Platform adjusting device and printing platform

The embodiment of the utility model provides a platform adjusting device and a printing platform. The platform adjusting device comprises an air suction platform, a mounting component and an adjusting component, the adjusting component comprises a guide base, a first sliding block, a second sliding block, an adjusting screw rod and a supporting base plate. The adjusting screw rod is connected with the first sliding block so as to drive the first sliding block to move in the first direction; the second sliding block abuts against the first sliding block so that the second sliding block can respond to movement of the first sliding block in the first direction and move in the second direction. The supporting base plate is connected with the second sliding block and the air suction platform so that the air suction platform can respond to movement of the second sliding block in the second direction to be away from or close to the installation component. The first direction is the axis direction of the adjusting sc