<p>Petroleum coke is the product of delayed coking in oil refining industry, which contains high heat and has high utilization value. Circulating fluidized bed combustion technology has developed faster and better in recent years; with its wide application, the production of petroleum coke ash will also be greatly increased. At this stage, the utilization and research of petroleum coke ash is less, so the recycling of petroleum coke ash has great research significance. This paper focuses on the effect of petroleum coke ash on the workability, mechanical properties and durability of concrete. The test is done by adding coke ash or pre-dissolved coke ash, fly ash, mineral powder, and high efficient water reducing agent to study the application of petroleum coke ash in concrete. The study shows that: the reasonable use of petroleum coke ash can significantly reduce the amount of cement; the incorporation of pre-dissolved coke ash is more favorable to the performance of the concrete than the incorporation of the original coke ash; when the amount of coke ash, the total amount of cementitious material is the same, the mechanical properties of compounded coke ash and S95 mineral powder, the anti-carbonation properties and the anti-chloride penetration properties are optimal; the anti-chloride penetration of the single mix of coke ash has the poorest capacity, and the mechanical properties and anti-carbonation properties of the compounded fly ash and coke ash are the worst. mechanical properties and the worst resistance to carbonation. The optimum ratio of petroleum coke ash in concrete is 15% pre-dissolved coke ash and 35% mineral powder.</p>