The invention discloses a port alignment and aims to solve the problems that in the prior art, the structure of a conventional port alignment is complicated, the operation is inconvenient and the production cost is high. The port alignment comprises a first connection pipe, a second connection pipe, a corrugated connection pipe, a first flange plate, a second flange plate, and connecting and adjusting members; the first flange plate, the first connection pipe, corrugated connection pipe, the second connection pipe, and the second flange plate are connected in sequence; there are at least two sets of connecting and adjusting members, and two ends of each connecting and adjusting member are respectively connected to the first flange plate and the second flange plate. The port alignment has the characteristics of simple structure, user-friendliness, and high reliability. By adjusting the port alignment, the precise alignment between parts (ion source, light source, operation rod, etc.) and a sample can be achieved. At the same time, the port alignment can lock the position, and thus related parts can be locked indirectly. The port alignment has the advantages of reasonable design, simple structure, user-friendliness, and low production cost, and thus has a good application prospect.