A display panel, a manufacturing method thereof, and a display device are provided. The display panel has a display area and a peripheral area surrounding the display area, the display panel includes a first substrate, a second substrate disposed opposite to the first substrate, and a sealing member. The sealing member is disposed between the first substrate, and the second substrate and located in the peripheral area, and configured to hermetically connect the first substrate and the second substrate, the sealing member includes a first sealant and a first retaining wall, an orthographic projection of the first retaining wall on the second substrate is at least partially overlapped with an orthographic projection of the first sealant on the second substrate, and elastic modulus of a material of the first sealant is greater than elastic modulus of a material of the first retaining wall.