A manual lifting-lowering computer table includes a table board and a keyboard board arranged under the table board. Sliding seats are arranged on both sides of a bottom surface of the table board, a group of bases parallel to the sliding seat are arranged under the table board, and a first supporting foot and a second supporting foot are arranged on the bases. A middle part of the first supporting foot and a middle part of the second supporting foot are hinged through a connecting shaft, and one ends of the first supporting foot and the second supporting foot away from the bases are arranged on the sliding seats respectively. The first supporting foot is provided with a supporting telescopic device. An upper end of the supporting telescopic device is hinged on the connecting seat arranged at one end of the sliding seat adjacent to the keyboard board.