The utility model discloses a valve push rod's bulb shear strength's test fixture, this valve push rod's bulb shear strength's test fixture includes: the base, it sets up on the testing machine, test sample table, its set up in on the base, this test sample table is provided with the sample supported hole, the sample supported hole is the through -hole, and sample locking mechanism, it is used for being fixed in valve push rod's pole body in the sample supported hole. Sample locking mechanism be one through threaded connection set up in the last sample locking bolt of test sample table, sample locking bolt perpendicular to the sample supported hole, just the tip of sample locking bolt can stretch into in the sample supported hole. The utility model discloses a test sample table can support the not valve push rod of equidimension through the sample supported hole to lock valve push rod by sample locking mechanism, thereby the valve push rod who is applicable to different models carries out shear strength test, its simple structure, with low costs and convenient to use.