The invention belongs to the technical field of building operations, relates to an evaluation method of concrete components, which comprises the following steps: the components and ratios of an additive existed in extracted sample concrete are analyzed in a spectroscopic detector; the weight of the concrete is obtained by pouring the sample concrete into a feed hopper and through a first weight sensing device, and the mixture of concrete and water is obtained by pouring wash water from a feeding opening to wash the concrete; pebbles and sands are filtered out from the mixture of concrete and water mixture through a double cone roller screen, and the weights of the saturated water absorption pebble and the saturated water absorption sand are measured out through a second weight sensing device respectively; and the field evaluation of concrete components is accomplished by computing the weights of the pebble, sand, cement and water by transferring the obtained weights of the concrete, the saturated water absorption stone and the saturated water absorption sand to an external display device. The evaluation method provided by the invention is simple, is reliable in theory, accurate in measuring result, and convenient to operate.