Special on-line intermediate measurement clamp

The utility model belongs to the technical field of intermediate measurement fixtures, and particularly relates to a special online intermediate measurement fixture which comprises a working box, a working plate is fixed on the top surface of the working box, supporting legs are fixed at four corners of the bottom surface of the working box, and a first guide groove and a second guide groove are formed in the top surface of the working box; according to the special on-line intermediate test fixture, through the cooperative use of the first bidirectional threaded rod and the second bidirectional threaded rod, the position of the clamping plate can be conveniently moved at the same time, and a worker can conveniently clamp PCBs of different sizes, so that the outer walls of the PCBs can be tightly attached to the first protective sleeve, and the working efficiency is improved. The first protective sleeve is fixed by the clamping plate, so that when the PCB is frequently mounted and dismounted, the first protect