The utility model provides an axiality test fixture, including base, connecting rod, regulation lifting/lowering member, regulating part and amesdial, adjust lifting/lowering member and locate the base side, connecting rod one end is connected with regulation lifting/lowering member, and the other end passes through the regulating part and the amesdial is connected, connecting rod axial motion canbe followed to the regulating part. It tests the judgement to the accessory that awaits measuring whether the bending to take place through the amesdial reading for the operation is screened with themeasuring that plays spring shaft to MWD impulse generator accessory ripple hollow shaft, has avoided using unqualified accessory in the pulser, and the effectual maintenance quality that has improved impulse generator has reduced wireless instrument fault rate, easy operation, safe and reliable, the on -the -spot application of being convenient for.