The invention discloses a compact type one-way sequence valve. The compact type one-way sequence valve comprises a valve body, a threaded sleeve, a valve seat, a one-way valve element, a sequence valve element and a pressure adjustment assembly, wherein the upper end of the valve body is provided with an opening A. The threaded sleeve is fixedly connected to the lower end of the valve body; the lower portion of the threaded sleeve is provided with an opening B; and a first flow through groove is formed in the upper portion of the threaded sleeve, wherein the first flow through groove enables an inner hole of the threaded sleeve to communicate with the opening B. The valve seat is of a T-shaped structure; a small-diameter portion of the valve seat extend into the inner hole of the threadedsleeve, and a flow through cavity is formed by the small-diameter portion of the valve seat and the inner hole of the threaded sleeve; and the side wall, below the flow through cavity, of the small-diameter portion is provided with a second flow through groove. The one-way valve element is arranged in the inner hole of the threaded sleeve in a sliding manner, and the upper portion of the one-way valve element is provided with an inner conical surface. The sequence valve element is internally provided with a first flow channel, wherein the first flow channel penetrates the sequence valve element in the axial direction; the lower portion of the sequence valve element penetrates the inner hole of the valve seat and is matched with the inner conical surface of the one-way valve element; and anannular step is formed between the middle and the lower portion of the sequence valve element. The pressure adjustment assembly is used for adjusting the switching-on pressure of the sequence valve element. The compact type one-way sequence valve has the beneficial effects that a one-way valve and a sequence valve are integrated; and the compact type one-way sequence valve is reasonable and compact in structure and low in cost.