Provided are an ultrasound contrast imaging method and apparatus. The method comprises: an initial step (S101), acquiring N frames of original contrast images; a projection imaging step (S103), projecting on the N frames of original contrast images to obtain a projection result image of the N frames of original contrast images, wherein for an nth frame of original contrast image, any frame of an nth group of original contrast images is used as a projection template for projecting on the nth group of original contrast images to acquire a projection result image of the nth frame of original contrast image, the nth group of original contrast images is within a projection period and comprises several frames of original contrast images of the nth frame of original contrast image, and the projection period is smaller than an imaging period; and a showing and storing step (S105), showing or storing the projection result image of the N frames of original contrast images. In the method, the projection period is a fixed value, accumulated errors caused by a projection process are only related to the projection period, and cannot increase as the imaging period increases, so that images continuously projected onto a template can better reflect spatial information, such as a filling and regression state of a micro vessel, of test subject in a current projection period.