1, black beans and black kidney beans have different shapes, the size of black kidney beans is smaller than that of black beans, and most black beans are round in shape, while black kidney beans are oval in shape. Black beans and black kidney beans are different in color and luster. Black beans are big and round, but their skins are black, but they don't shine. Black kidney beans are small and their skins are black and shiny.

2. The kernels of black beans and black kidney beans are different. When you open black beans, you can see yellow and green kernels, while the kernel of black kidney beans is only white. You can open one when you buy beans.

3, black beans and black kidney beans can also see the difference after soaking in water for a period of time. Black kidney beans fade badly. After soaking in water for a period of time, the water will become black water, while black beans are more like brown sugar water after soaking.

4. Black bean is a kind of soybean, just like soybean, it can be eaten as a sprout, which has the effect of tonifying kidney, while black kidney bean is a kind of starch bean, which contains high starch and can supplement the calcium needed by human body. From this point of view, the effect of black kidney bean is not as obvious as black bean.

5. Black beans and black kidney beans sold in the market are also different in price. Generally, the price of black beans will be higher than that of black kidney beans.