Abstract: Mortar strength, as a core indicator for evaluating cement product quality, has its testing accuracy directly impacting construction engineering quality and material selection. The current national standard "General Portland Cement" (GB 175-2023) recommends two forming methods, namely the vibration table method (benchmark method) and the vibration table method (substitute method). However, significant differences in the operation process and vibration mechanism between the two methods may lead to deviations in the test results, causing confusion in the selection of specimen forming methods. This study systematically conducted a series of comparative tests using four typical cement samples (P.Ⅱ52.5, P.Ⅱ52.5R, P.O 42.5, and P.Ⅰ42.5) under controlled environmental conditions (temperature (20±2)℃, humidity 50%-60%) with unified testing equipment and operators. Quantitative analysis was performed through density measurement, air pore observation, and compressive/flexural strength testing, evaluating molding efficiency, specimen compactness, and strength development patterns. Results demonstrate that specimens formed by the vibration table method through high-frequency, low-amplitude vibration (3000 cycles/min, 0.76 mm) achieved 1.0%-2.5% higher compactness compared to the jolting table method, with approximately 40% reduction in air pores. The 3-day and 28-day flexural strengths increased by 7%-13% and 5%-10% respectively, while the 3-day and 28-day compressive strengths improved by 5%-10% and 4%-12% correspondingly. This research confirms that the vibration table method optimizes energy transfer efficiency (10-fold energy consumption increase to 30,000 J), significantly improving specimen uniformity. It is recommended that testing laboratories prioritize the use of vibration table method for forming time specimens. This method not only simplifies the operation process (reducing steps by 62.5%), but also improves testing efficiency by more than 30%, providing technical support for accurate evaluation of cement quality.