A vascular imaging apparatus, comprising: a light source device, an image acquisition device, a projection device and an image processor, wherein the light source device is configured to emit visible light and infrared light to a body portion to be tested in a time-sharing manner; the image acquisition device is configured to receive the visible light reflected by the body portion to be tested to acquire a visible image, receive the infrared light reflected by the body portion to be tested to acquire an infrared image, and transmit the infrared image and the visible image to the image processor; the image processor is configured to receive the infrared image and the visible image, and perform image processing on the infrared image and the visible image, to acquire a vascular enhancement image of the body portion to be tested, and the image processor is further configured to transmit the vascular enhancement image to the projection device; and the projection device is configured to receive the vascular enhancement image and project the vascular enhancement image onto the body portion to be tested; characterized in that the image processor is configured to: perform vascular recognition processing on the visible image and the infrared image, to respectively acquire a first vascular region and a first non-vascular region in the infrared image, a second vascular region and a second non-vascular region in the visible image, calculate a ratio of an average light intensity value of the first non-vascular region in the infrared image to an average light intensity value of the second non-vascular region in the visible image, calculate a product of a light intensity value of the visible image and the ratio, and perform difference processing on a light intensity value of the infrared image and the product, to acquire the vascular enhancement image, and normalize the vascular image to acquire the vascular enhancement image. wherein the light source device is configured to emit visible light and infrared light to a body portion to be tested in a time-sharing manner; the image acquisition device is configured to receive the visible light reflected by the body portion to be tested to acquire a visible image, receive the infrared light reflected by the body portion to be tested to acquire an infrared image, and transmit the infrared image and the visible image to the image processor; the image processor is configured to receive the infrared image and the visible image, and perform image processing on the infrared image and the visible image, to acquire a vascular enhancement image of the body portion to be tested, and the image processor is further configured to transmit the vascular enhancement image to the projection device; and the projection device is configured to receive the vascular enhancement image and project the vascular enhancement image onto the body portion to be tested; characterized in that the image processor is configured to: perform vascular recognition processing on the visible image and the infrared image, to respectively acquire a first vascular region and a first non-vascular region in the infrared image, a second vascular region and a second non-vascular region in the visible image, calculate a ratio of an average light intensity value of the first non-vascular region in the infrared image to an average light intensity value of the second non-vascular region in the visible image, calculate a product of a light intensity value of the visible image and the ratio, and perform difference processing on a light intensity value of the infrared image and the product, to acquire the vascular enhancement image, and normalize the vascular image to acquire the vascular enhancement image. perform vascular recognition processing on the visible image and the infrared image, to respectively acquire a first vascular region and a first non-vascular region in the infrared image, a second vascular region and a second non-vascular region in the visible image, calculate a ratio of an average light intensity value of the first non-vascular region in the infrared image to an average light intensity value of the second non-vascular region in the visible image, calculate a product of a light intensity value of the visible image and the ratio, and perform difference processing on a light intensity value of the infrared image and the product, to acquire the vascular enhancement image, and normalize the vascular image to acquire the vascular enhancement image.