A tie-down bar apparatus and method for securing Cargo onto the bed of trailer or full-size, mid-size, or small pick-up truck comprising an adjustable telescoping support bar having a main body and two ends, the main body of the telescoping support bar has at least one tie-down ring is connected to the main body for securing one or more pieces of cargo including recreational vehicles, the main body of the telescoping support bar has two elongated arm which are positioning inside each end of the main body, to create the telescoping effect so that the support bar can be adjusted to match the size of the width of a vehicle's bed. Wherein a user will install said pair of connectors to the vehicle thereby securely attaching said telescoping support bar to the bed of vehicle. Wherein a user will place one or more pieces of cargo into said bed of the vehicle and then utilize one or more restraining means for securing said cargo in an upright position by connecting said restraining means to both the tie-down rings and to the cargo.