The invention discloses a valve support device convenient to apply. The valve support device comprises a fixed base, stabilizing devices, a sliding groove, sliding seats, support plates, arc-shaped holes, fastening screws, tightening screws, buffer pads and arc-shaped faces. The sliding groove is formed in the upper end of the fixed base. The two symmetrical sliding seats are arranged in the sliding groove. The support plates are fixedly arranged at the upper ends of the corresponding sliding seats. The arc-shaped faces are arranged at the top ends of the corresponding support plates. The buffer pads are arranged on the corresponding arc-shaped faces. The arc-shaped holes are formed in the middles of the corresponding support plates. The fastening screws are arranged in the corresponding arc-shaped holes. The two stabilizing devices are symmetrically arranged at the bottom end of the fixed base. The vertical tightening screws are arranged on the fixed base. The tightening screws abut against the bottom ends of the corresponding sliding seats. The valve support device is simple in structure, convenient to use, good in stabilizing and supporting effects, high in adaptability and convenient to assemble and disassemble.